feature "not watched" new subscription videos

[hgkamath]

It is desirable to play all unwatched videos in a channel/feed back-to-back

Currently if one right clicks on "New Subscriptions" located at
Videos -> Video Addons -> Youtube -> My Subsciptions -> New Subscriptions
One sees the following options
Play all
Shuffle and Play all
Now playing
Add to favorites
Addon Settings
The confluence sidebar has options forchanging
changing view type
changing sort order
hiding watched (des not work)
search filter (does not work)

Suggestion: augment the confluence sidebar/right click menu to have checkboxes for "Play all"
Play all
[X] Shuffle/Chronological [X] watched/unwatched [X] sort in order/reverse order
Now playing
Add to favorites
Addon Settings
The confluence menu is already able to change sort order.

Youtube may keep track of a "watched tag" of a video a feed.
Youtube also provides a history, so if a video is in the history then it has been watched.
Kodi/youtube addon also seems to keep track of its own "watched tag"
The confluence side bar also seems to have a hide-watched radio-option.

If Youtube or Kodi marks a video or watched
or if a video is listed in youtube's or kodos's watched history
then it can be considered watched.