If you watch a lot of YouTube (i try not to these days), might I just shill for the "Sponsor Block" extension [1]? It blocks those sponsored segments in youtube videos. You can also submit segments to save others time so they can consoom more content.
I have saved 2.5 hrs and saved others nearly an hour through my submissions.
If you want to watch less YouTube, you can use uBlock element picker to remove everything but the search bar. My YouTube web interface is just that now, no recommendations, no nothing. Bliss.
3: Right click on any element in the page and click "block element". Do this for anything you don't want to see. If you make a mistake you can unblock it by deleting the line in the "filters" part of Ublock settings.
It can take some trial and error to get it working properly but once you do its so nice. I don't even have a sign in button anymore because I don't have a google account.
Edit: For maximum procrastination prevention you can even block those end card recommendations once a video finishes.
Youtube is also massively better with "enhancer for youtube" [1]. It's not FOSS I don't think but it is too good to not use.
I have saved 2.5 hrs and saved others nearly an hour through my submissions.
[1] https://sponsor.ajay.app/