[Feature Request] in place (subscriptions) player

Since the retirement (for all non-app users) of 'YouTube on TV', it is painful to be updated with subscriptions. Subscription page reloads most of the time after watching a video; and doing so requires to scroll again and again looking to the exactly same place as before... to problem is, if usually takes more time than most of the video's length.
'YouTube on TV' at least could bring you back to the exact same spatial location on your subscription after watching a video, so it was really easy and productive to just watch the next one interesting and be up to date with your subscriptions.

A solution to this problem may be to include a feature to play videos in place in the subscription list. Basically, preventing it from reloading and scrolling again and again after watching each video.
It is very similar to those JS Image Gallery scripts (lightgallery, photoswipe, etc). An implementation to youtube has be done before by the Better YouTube Subscriptions, by Luca Matthew DeCaprio ( https://chrome.google.com/webstore/detail/better-youtube-subscripti/kgicdngjllamjgijagdkoalhkpplipnd ), it is a good implementation, unfortunately it may be a little outdated, as it doesn't work past the first "page" of subscriptions loaded, and the default config of the in place/gallery player's button location currently conflicts a little with ImprovedTube's blacklist button. Still, it is a good implementation, partially working to illustrate this feature request.

Of course, the in-place player may also work in any other pages, like home, channels, history, but I'm focusing in the subscriptions page, were due youtube's limitations, it will mostly useful.

Start by mapping the subscription page and the existing in-place/gallery player behavior described in the issue, including how later pages of subscriptions are loaded. Done means videos can play from the subscription list without reloading or losing the user's scroll position, while remaining useful beyond the first loaded page and avoiding the reported button conflict.