Currently I'm watching the Pro Volleyball Federation games since they just launched so they're streaming everything for free. That's probably a bit genre specific since I still play vb and have daughters playing club vb.
I watch the 24 hours of lemons stuff because I intend to race in it someday and there's some pretty funny stuff.
I recently found The Why Files which is a combination of (thankfully non-political) conspiracy theory and little known facts.
I've been watching savagegeese for car reviews. Donut media for somewhat random car stuff. Project farm for all sorts of product testing.
Edit: Oh and of course, you can never go wrong with Epic Rap Battles of History