Honestly it depends. A lot of my online time in the last ~5 years has strayed away from YouTube. Most of my time is just spent playing musicbee while browsing anidb/ MAL/ MFC, searching for rares / chatting on soulseek, or watching anime / movies. But YouTube does come undeniably handy for those times where you want something you can't find anywhere else online, like people going solo into hard-to-access countries to record their journeys, or tutorials that explain things in much more detail than text could due to visual demonstration, or more in-depth reviews of products where the video makes it a lot easier to feel the size / scale of the product I'm looking at.

Could I do it? Sure. But it would definitely be hard for a long time, as I track down various blogs / self hosted websites with what I liked to use YouTube for. But honestly that kind of internet might be better. Or if a smaller platform would gain more traction so YouTube wasn't the only option. I think that would be ideal.