Checklist

• I made sure that there are no existing issues - open or closed - which I could contribute my information to.
• I have read the FAQ and my problem isn't listed.
• I'm aware that this is a request for NewPipe itself and that requests for adding a new service need to be made at NewPipeExtractor.
• I have taken the time to fill in all the required details. I understand that the feature request will be dismissed otherwise.
• This issue contains only one feature request.
• I have read and understood the contribution guidelines.

Feature description

On a youtube channel's "Playlist" view, if a playlist is selected with a long press a menu should appear (akin to the long press on a single video). On that menu, a "Mark all as watched" item appears that when pushed iterates the list of videos in the playlist and mark all as watched.

Why do you want this feature?

I often have watched long playlists of videos in the official youtube app, and want to also mark them as watched in NewPipe. Right now if I want to mark them all, I have to open the playlist and mark each video manually, which takes forever on playlists with 100+ videos.

Additional information

No response