Or just download with yt-dlp ( https://github.com/yt-dlp/yt-dlp ).
Why even download? You can use third party media players like MPC-BE or MPC-HC that leverage yt-dlp to stream the video into a media player without any ads of course. Yes, sometimes it makes sense to download if you want to keep the video, but to just watch just stream it via yt-dlp to a media player.
A major part apart from building a queue by getting behind is the ability of the file manager to sort, to classify, to filter, to move into folders, to search, etc. Far better than the youtube web interface, which only has the options of displaying your subscriptions as a grid or as a list. So I now have a local queue of videos which I can use, in which weird expeditions into obscure genres are into their own folders, must-match-now videos are tagged, etc, and I can pick and choose according to my own tastes of the moment.
That is one of my pet peeves in UI design in the last decade and it is not only web applications – shoebox apps are often as limited. If you want to do anything to your data or just have different sort orders or views, you only have what the app developer allows and often that is nothing.
Thanks to the web and shoebox apps I appreciate file managers like Finder even more now. It’s amazing what UI controls like NSTableView/NSOutlineView gives the user in functionality. Modern collection views often look better and I appreciate that, but I do miss the functionality which, while possible, often simply is not implemented.