diff --git a/.bumpversion.cfg b/.bumpversion.cfg
index fa394e9d6..835b767fa 100644
--- a/.bumpversion.cfg
+++ b/.bumpversion.cfg
@@ -1,5 +1,5 @@
 [bumpversion]
-current_version = 4.1.25
+current_version = 4.1.26
 commit = False
 tag = False
 
diff --git a/dev/local/setup.cfg b/dev/local/setup.cfg
index dd30723a4..a5587416d 100644
--- a/dev/local/setup.cfg
+++ b/dev/local/setup.cfg
@@ -1,6 +1,6 @@
 [metadata]
 name = Delphi Development
-version = 4.1.25
+version = 4.1.26
 
 [options]
 packages =
diff --git a/docs/api/README.md b/docs/api/README.md
index 709d068e0..a3a3986fa 100644
--- a/docs/api/README.md
+++ b/docs/api/README.md
@@ -4,11 +4,12 @@ nav_order: 3
 has_children: true
 ---
 
-# Epidata API (Other Diseases)
+# Other Endpoints (COVID-19 and Other Diseases)
 
 This is the home of [Delphi](https://delphi.cmu.edu/)'s epidemiological data
 API for tracking epidemics such as influenza, dengue, and norovirus. Note that
-our work on COVID-19 is described in the [COVIDcast Epidata API documentation](covidcast.md).
+additional data, including most COVID-19 signals, is available in the
+[main Epidata API (formerly known as COVIDcast)](covidcast.md).
 
 ## Table of Contents
 {: .no_toc .text-delta}
diff --git a/docs/api/covidcast-signals/fb-survey.md b/docs/api/covidcast-signals/fb-survey.md
index 35ac7401b..fee18715b 100644
--- a/docs/api/covidcast-signals/fb-survey.md
+++ b/docs/api/covidcast-signals/fb-survey.md
@@ -126,7 +126,8 @@ our survey, this means a and (b or c).
 
 COVID-like illness or CLI is not a standard indicator. Through our discussions
 with the CDC, we chose to define it as: fever along with cough or shortness of
-breath or difficulty breathing.
+breath or difficulty breathing. From the list of symptoms from Q1 on
+our survey, this means a and (c or d or e).
 
 Symptoms alone are not sufficient to diagnose influenza or coronavirus
 infections, and so these ILI and CLI indicators are *not* expected to be
diff --git a/docs/api/covidcast-signals/youtube-survey.md b/docs/api/covidcast-signals/youtube-survey.md
new file mode 100644
index 000000000..9b7105171
--- /dev/null
+++ b/docs/api/covidcast-signals/youtube-survey.md
@@ -0,0 +1,175 @@
+---
+title: Youtube Survey
+parent: Inactive Signals
+grand_parent: COVIDcast Main Endpoint
+---
+
+[//]: # (code at https://github.com/cmu-delphi/covid-19/tree/deeb4dc1e9a30622b415361ef6b99198e77d2a94/youtube)
+
+# Youtube Survey
+{: .no_toc}
+
+* **Source name:** `youtube-survey`
+* **Earliest issue available:** May 01, 2020
+* **Number of data revisions since May 19, 2020:** 0
+* **Date of last change:** Never
+* **Available for:** state (see [geography coding docs](../covidcast_geography.md))
+* **Time type:** day (see [date format docs](../covidcast_times.md))
+* **License:** [CC BY-NC](../covidcast_licensing.md#creative-commons-attribution-noncommercial)
+
+## Overview
+
+This data source is based on a short survey about COVID-19-like illness
+run by the Delphi group at Carnegie Mellon.
+[Youtube directed](https://9to5google.com/2020/04/29/google-covid-19-cmu-research-survey/)
+a random sample of its users to these surveys, which were
+voluntary. Users age 18 or older were eligible to complete the surveys, and
+their survey responses are held by CMU. No individual survey responses are
+shared back to Youtube.
+
+This survey was a pared-down version of the
+[COVID-19 Trends and Impact Survey (CTIS)](../../symptom-survey/),
+collecting data only about COVID-19 symptoms. CTIS is much longer-running
+and more detailed, also collecting belief and behavior data. CTIS also reports
+demographic-corrected versions of some metrics. See our
+[surveys page](https://delphi.cmu.edu/covid19/ctis/) for more detail
+about how CTIS works.
+
+The two surveys report some of the same metrics. While nominally the same,
+note that values from the same dates differ between the two surveys for
+[unknown reasons](#limitations).
+
+As of late April 2020, the number of Youtube survey responses we received each
+day was 4-7 thousand. This was not enough coverage to report at finer
+geographic levels, so this indicator only reports at the state level. The
+survey ran from April 21, 2020 to June 17, 2020, collecting about 159
+thousand responses in the United States in that time.
+
+We produce [influenza-like and COVID-like illness indicators](#ili-and-cli-indicators)
+based on the survey data.
+
+## Table of Contents
+{: .no_toc .text-delta}
+
+1. TOC
+{:toc}
+
+## Survey Text and Questions
+
+The survey contains the following 5 questions:
+
+1. In the past 24 hours, have you or anyone in your household experienced any of the following:
+   - (a) Fever (100 °F or higher)
+   - (b) Sore throat
+   - (c) Cough
+   - (d) Shortness of breath
+   - (e) Difficulty breathing
+2. How many people in your household (including yourself) are sick (fever, along with at least one other symptom from the above list)?
+3. How many people are there in your household (including yourself)?
+4. What is your current ZIP code?
+5. How many additional people in your local community that you know personally are sick (fever, along with at least one other symptom from the above list)?
+
+
+## ILI and CLI Indicators
+
+We define COVID-like illness (fever, along with cough, or shortness of breath,
+or difficulty breathing) or influenza-like illness (fever, along with cough or
+sore throat) for use in forecasting and modeling. Using this survey data, we
+estimate the percentage of people (age 18 or older) who have a COVID-like
+illness, or influenza-like illness, in a given location, on a given day.
+
+| Signals | Description |
+| --- | --- |
+| `raw_cli` and `smoothed_cli` | Estimated percentage of people with COVID-like illness <br/> **Earliest date available:** 2020-04-21 |
+| `raw_ili` and `smoothed_ili` | Estimated percentage of people with influenza-like illness <br/> **Earliest date available:** 2020-04-21 |
+
+Influenza-like illness or ILI is a standard indicator, and is defined by the CDC
+as: fever along with sore throat or cough. From the list of symptoms from Q1 on
+our survey, this means a and (b or c).
+
+COVID-like illness or CLI is not a standard indicator. Through our discussions
+with the CDC, we chose to define it as: fever along with cough or shortness of
+breath or difficulty breathing. From the list of symptoms from Q1 on
+our survey, this means a and (c or d or e).
+
+Symptoms alone are not sufficient to diagnose influenza or coronavirus
+infections, and so these ILI and CLI indicators are *not* expected to be
+unbiased estimates of the true rate of influenza or coronavirus infections.
+These symptoms can be caused by many other conditions, and many true infections
+can be asymptomatic. Instead, we expect these indicators to be useful for
+comparison across the United States and across time, to determine where symptoms
+appear to be increasing.
+
+
+## Estimation
+
+### Estimating Percent ILI and CLI
+
+Estimates are calculated using the
+[same method as CTIS](./fb-survey#estimating-percent-ili-and-cli).
+However, the Youtube survey does not do weighting.
+
+### Smoothing
+
+The smoothed versions of all `youtube-survey` signals (with `smoothed` prefix) are
+calculated using seven day pooling. For example, the estimate reported for June
+7 in a specific geographical area is formed by
+collecting all surveys completed between June 1 and 7 (inclusive) and using that
+data in the estimation procedures described above. Because the smoothed signals combine
+information across multiple days, they have larger sample sizes and hence are
+available for more locations than the raw signals.
+
+## Lag and Backfill
+
+This indicator has a lag of 2 days. Reported values can be revised for one
+day (corresponding to a lag of 3 days), due to how we receive survey
+responses. However, these tend to be associated with minimal changes in
+value.
+
+
+## Limitations
+
+When interpreting the signals above, it is important to keep in mind several
+limitations of this survey data.
+
+* **Survey population.** People are eligible to participate in the survey if
+  they are age 18 or older, they are currently located in the USA, and they are
+  an active user of Youtube. The survey data does not report on children under
+  age 18, and the Youtube adult user population may differ from the United
+  States population generally in important ways. We don't adjust for any
+  demographic biases.
+* **Non-response bias.** The survey is voluntary, and people who accept the
+  invitation when it is presented to them on Youtube may be different from
+  those who do not.
+* **Social desirability.** Previous survey research has shown that people's
+  responses to surveys are often biased by what responses they believe are
+  socially desirable or acceptable. For example, if it there is widespread
+  pressure to wear masks, respondents who do *not* wear masks may feel pressured
+  to answer that they *do*. This survey is anonymous and online, meaning we
+  expect the social desirability effect to be smaller, but it may still be
+  present.
+
+Whenever possible, you should compare this data to other independent sources. We
+believe that while these biases may affect point estimates -- that is, they may
+bias estimates on a specific day up or down -- the biases should not change
+strongly over time. This means that *changes* in signals, such as increases or
+decreases, are likely to represent true changes in the underlying population,
+even if point estimates are biased.
+
+### Privacy Restrictions
+
+To protect respondent privacy, we discard any estimate that is based on fewer than 100 survey responses. For
+signals reported using a 7-day average (those beginning with `smoothed_`), this
+means a geographic area must have at least 100 responses in 7 days to be
+reported.
+
+This affects some items more than others. It affects some geographic areas
+more than others, particularly areas with smaller populations. This affect is
+less pronounced with smoothed signals, since responses are pooled across a
+longer time period.
+
+
+## Source and Licensing
+
+This indicator aggregates responses from a Delphi-run survey that is hosted on the Youtube platform.
+The data is licensed as [CC BY-NC](../covidcast_licensing.md#creative-commons-attribution-noncommercial).
diff --git a/src/client/delphi_epidata.R b/src/client/delphi_epidata.R
index fd461de00..665522b58 100644
--- a/src/client/delphi_epidata.R
+++ b/src/client/delphi_epidata.R
@@ -15,7 +15,7 @@ Epidata <- (function() {
   # API base url
   BASE_URL <- getOption('epidata.url', default = 'https://api.delphi.cmu.edu/epidata/')
 
-  client_version <- '4.1.25'
+  client_version <- '4.1.26'
 
   auth <- getOption("epidata.auth", default = NA)
 
diff --git a/src/client/delphi_epidata.js b/src/client/delphi_epidata.js
index 7afa235c0..b403eec73 100644
--- a/src/client/delphi_epidata.js
+++ b/src/client/delphi_epidata.js
@@ -22,7 +22,7 @@
   }
 })(this, function (exports, fetchImpl, jQuery) {
   const BASE_URL = "https://api.delphi.cmu.edu/epidata/";
-  const client_version = "4.1.25";
+  const client_version = "4.1.26";
 
   // Helper function to cast values and/or ranges to strings
   function _listitem(value) {
diff --git a/src/client/packaging/npm/package.json b/src/client/packaging/npm/package.json
index c88d0c6ec..2eb3d4972 100644
--- a/src/client/packaging/npm/package.json
+++ b/src/client/packaging/npm/package.json
@@ -2,7 +2,7 @@
   "name": "delphi_epidata",
   "description": "Delphi Epidata API Client",
   "authors": "Delphi Group",
-  "version": "4.1.25",
+  "version": "4.1.26",
   "license": "MIT",
   "homepage": "https://github.com/cmu-delphi/delphi-epidata",
   "bugs": {
diff --git a/src/server/_config.py b/src/server/_config.py
index 7ca9ae486..17c0b79b6 100644
--- a/src/server/_config.py
+++ b/src/server/_config.py
@@ -7,7 +7,7 @@
 
 load_dotenv()
 
-VERSION = "4.1.25"
+VERSION = "4.1.26"
 
 MAX_RESULTS = int(10e6)
 MAX_COMPATIBILITY_RESULTS = int(3650)
diff --git a/src/server/endpoints/covidcast_utils/db_signals.csv b/src/server/endpoints/covidcast_utils/db_signals.csv
index b14d477ae..9844a3ffb 100644
--- a/src/server/endpoints/covidcast_utils/db_signals.csv
+++ b/src/server/endpoints/covidcast_utils/db_signals.csv
@@ -1575,7 +1575,7 @@ NSSP does not report county-level data for all counties with reporting EDs; some
 The following states report no data through NSSP at the county level: CA, WA, AK, AZ, AL, CO, SD, ND, MO, AR, FL, OH, NH, CT, NJ.
 
 South Dakota, Missouri, and territories report no data through NSSP at the state level.",Percentage,percent,other,bad,FALSE,FALSE,FALSE,FALSE,FALSE,,,,,,
-nssp,pct_ed_visits_rsv,FALSE,pct_ed_visits_rsv,FALSE,COVID Emergency Department Visits (Percent of total ED visits),TRUE,Percent of ED visits that had a discharge diagnosis code of rsv,Percent of ED visits that had a discharge diagnosis code of rsv,National Syndromic Surveillance Program,rsv,Hospitalizations,USA,"county,state,hrr,msa","hrr,msa",2022-10-01,,ongoing,,week,Week,weekly,,,All,None,hospitalized,,"Data is available for 78% of US emergency departments. California, Colorado, Missouri, Oklahoma, and Virginia have the most noticeable gaps in coverage, with many counties in those states having either no eligible EDs or having no recently reported data in NSSP. However, most states have some counties that do not contain any reporting EDs.
+nssp,pct_ed_visits_rsv,FALSE,pct_ed_visits_rsv,FALSE,RSV Emergency Department Visits (Percent of total ED visits),TRUE,Percent of ED visits that had a discharge diagnosis code of rsv,Percent of ED visits that had a discharge diagnosis code of rsv,National Syndromic Surveillance Program,rsv,Hospitalizations,USA,"county,state,hrr,msa","hrr,msa",2022-10-01,,ongoing,,week,Week,weekly,,,All,None,hospitalized,,"Data is available for 78% of US emergency departments. California, Colorado, Missouri, Oklahoma, and Virginia have the most noticeable gaps in coverage, with many counties in those states having either no eligible EDs or having no recently reported data in NSSP. However, most states have some counties that do not contain any reporting EDs.
 
 NSSP does not report county-level data for all counties with reporting EDs; some reporting EDs are only included in state-level values.
 
@@ -1596,14 +1596,14 @@ NSSP does not report county-level data for all counties with reporting EDs; some
 The following states report no data through NSSP at the county level: CA, WA, AK, AZ, AL, CO, SD, ND, MO, AR, FL, OH, NH, CT, NJ.
 
 South Dakota, Missouri, and territories report no data through NSSP at the state level.",Percentage,percent,other,bad,TRUE,FALSE,FALSE,FALSE,FALSE,,,,,,
-nssp,pct_ed_visits_influenza,TRUE,smoothed_pct_ed_visits_influenza,FALSE,Influenza Emergency Department Visits (Percent of total ED visits),TRUE,3-week moving average of percent of ED visits that had a discharge diagnosis code of influenza,3-week moving average of percent of ED visits that had a discharge diagnosis code of influenza,National Syndromic Surveillance Program,flu,Hospitalizations,USA,"county,state,hrr,msa","hrr,msa",2022-10-01,,ongoing,,week,Week,weekly,,,All,None,hospitalized,,"Data is available for 78% of US emergency departments. California, Colorado, Missouri, Oklahoma, and Virginia have the most noticeable gaps in coverage, with many counties in those states having either no eligible EDs or having no recently reported data in NSSP. However, most states have some counties that do not contain any reporting EDs.
+nssp,pct_ed_visits_influenza,TRUE,smoothed_pct_ed_visits_influenza,FALSE,"Influenza Emergency Department Visits (Percent of total ED visits, 3-week average)",TRUE,3-week moving average of percent of ED visits that had a discharge diagnosis code of influenza,3-week moving average of percent of ED visits that had a discharge diagnosis code of influenza,National Syndromic Surveillance Program,flu,Hospitalizations,USA,"county,state,hrr,msa","hrr,msa",2022-10-01,,ongoing,,week,Week,weekly,,,All,None,hospitalized,,"Data is available for 78% of US emergency departments. California, Colorado, Missouri, Oklahoma, and Virginia have the most noticeable gaps in coverage, with many counties in those states having either no eligible EDs or having no recently reported data in NSSP. However, most states have some counties that do not contain any reporting EDs.
 
 NSSP does not report county-level data for all counties with reporting EDs; some reporting EDs are only included in state-level values.
 
 The following states report no data through NSSP at the county level: CA, WA, AK, AZ, AL, CO, SD, ND, MO, AR, FL, OH, NH, CT, NJ.
 
 South Dakota, Missouri, and territories report no data through NSSP at the state level.",Percentage,percent,other,bad,TRUE,FALSE,FALSE,FALSE,FALSE,,,,,,
-nssp,pct_ed_visits_rsv,TRUE,smoothed_pct_ed_visits_rsv,FALSE,COVID Emergency Department Visits (Percent of total ED visits),TRUE,3-week moving average of percent of ED visits that had a discharge diagnosis code of rsv,3-week moving average of percent of ED visits that had a discharge diagnosis code of rsv,National Syndromic Surveillance Program,rsv,Hospitalizations,USA,"county,state,hrr,msa","hrr,msa",2022-10-01,,ongoing,,week,Week,weekly,,,All,None,hospitalized,,"Data is available for 78% of US emergency departments. California, Colorado, Missouri, Oklahoma, and Virginia have the most noticeable gaps in coverage, with many counties in those states having either no eligible EDs or having no recently reported data in NSSP. However, most states have some counties that do not contain any reporting EDs.
+nssp,pct_ed_visits_rsv,TRUE,smoothed_pct_ed_visits_rsv,FALSE,"RSV Emergency Department Visits (Percent of total ED visits, 3-week average)",TRUE,3-week moving average of percent of ED visits that had a discharge diagnosis code of rsv,3-week moving average of percent of ED visits that had a discharge diagnosis code of rsv,National Syndromic Surveillance Program,rsv,Hospitalizations,USA,"county,state,hrr,msa","hrr,msa",2022-10-01,,ongoing,,week,Week,weekly,,,All,None,hospitalized,,"Data is available for 78% of US emergency departments. California, Colorado, Missouri, Oklahoma, and Virginia have the most noticeable gaps in coverage, with many counties in those states having either no eligible EDs or having no recently reported data in NSSP. However, most states have some counties that do not contain any reporting EDs.
 
 NSSP does not report county-level data for all counties with reporting EDs; some reporting EDs are only included in state-level values.