I've noticed the same. When I go looking for some video on youtube, I first pause, prepare my query in my mind and then open youtube & rush to type what I prepared, sift quickly and try to find what I'm looking for, then close the tab/quit the app when I'm done. It's the same feeling as dashing into a hostile store trying to upsell you on stuff and waste your time, when all you needed is 1 thing.
For actual video hosting, assuming ad revenue is not desired, Vimeo seems pretty good.
I find it hilarious that YouTube's iOS app is always pushing me to try a trial of their premium product, one of the major selling points being that videos continue to play in the background when you close the app.
When, in fact, closing the app is the most reliable way to get YouTube to stop playing. From inadvertent clicks in the Wrong Place on the screen that launch some crap or play some ad, to autoplay, as soon as my content is over, I can't wait to kill the app and make it all stop. It's a hell of a lot easier than finding pause/stop.
These ads do something to my mindset that really puts me in a bad place. I used to spend hours on youtube. I loved watching videos related to my hobbies etc. Now, it seems like a chore.
For actual video hosting, assuming ad revenue is not desired, Vimeo seems pretty good.