One thing I find quite annoying with YouTube is “Recommended For You” spam in the related videos section. I do not sign into YouTube and use Firefox Containers so most “Recommended For You” videos are irrelevant, distracting, and seem suspiciously like they’ve been paid for (I don’t know if this is true).
As a user of uBlock Origin, I do have the ability to add custom filters to block DOM elements. After fiddling around with things and searching the web, I managed to come up with this filter which gets rid of “Recommended For You” from the related videos list,
youtube.com###css selector:has-text(Recommended for you)
You can put this line in “My filters” (on uBlock’s setting page).
-  Cosmetic filters. https://github.com/gorhill/uBlock/wiki/Static-filter-syntax#cosmetic-filters