Hide items from feed that are inside a playlist

[MFlisar]

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

I want to have an option to hide videos that are already in any watchlist from the main feed regardless of there watched state.

Why do you want this feature?

Sometimes I have like 3-4 partly watched videos and have them placed inside a "watch it later" playlist alongside with a few unwatched videos.

As soon as I put a video into my "watch it later" playlist, I want those videos to be removed from my feed because they are just clutter in my feed.

Additionally I want that the videos inside this list can save there watched progress without influencing if they show up in the feed or not. Currently you have to mark a video as watched AND put it into the "watch it later" playlist, this has the side effect, that if you want a clean feed you must keep the videos in the "watch it later" playlist in the watched state. As soon as you start the video though it will pop up in the feed again (if you don't watch it until the end).

Additional information

It seems like a "watch it later" playlist + "hide watched videos from feed" is the officially decided solution for such a use case but if there is no solution to use this workaround with partly or unwatched videos it's still very limiting.

With my suggestion this solution would be a lot more usable.

Also, a real work around for a "watch it later" list should be able to hold unwatched videos - my suggestion would have this advantage.