I never watch political stuff on YouTube (outside of political satire, anyway). Life's too short. I'd rather get my political news from reputable news sources.
I watched a couple of Michelle Rempel's anti-Justin diatribes. She's sitting on the floor in her living room, ranting and raving about him. It wasn't Kellie Leitch-levels of bizarre, but it wasn't dignified by any means.
It's amazing how fast anything to do with Canada can turn political on that site. Some jerk tried to goad me into a fight about CanCon in the middle of the comments on a reaction channel (Badd Medicine, 3 older guys in their 30s/40s who post reactions to movies). They were reacting to the 20th anniversary of the Harry Potter movies and I'd just mentioned not being able to see it because it wasn't available in any affordable way in this region of the country.
I don't really have a lot of time for YouTube viewing, so the main type of videos I watch are comedic shorts, usually under 5 minutes. I will occasionally watch a short film, like on Dust or something, but typically only click on the ones that are 15 - 20 minutes or less.
I know there are some great long-form video essays on there, but just finding time to dedicate to sit and watching YouTube for an hour or more is not usually likely. (And when I do have that much time, I would usually decide to spend it watching one of the many acutal TV shows I'd like to watch but never seem to have the time for.) I have seen some long-form videos, and enjoyed most of them, but I mainly watched them while on the treadmill. I quickly released I preferred exercising to music instead, so went back to that.
I found out that someone uploaded most of the 15th season of The Beachcombers on YouTube. A few years ago I stumbled over a treasure trove of Bonanza - the first 6 seasons, plus part of the 13th season. I'm old enough to remember that show in its first run, and gained a whole new appreciation for Pernell Roberts. This came in handy 3 years ago when I was in the hospital for 2 weeks. I'd asked a friend to bring my computer as they had wi-fi, and I ended up saddled with a cantankerous older man as a roommate who was livid that he'd been moved to the patients' lounge (so had I; the hospital was crammed full) and had no access to TV (there wasn't a working TV in the lounge).
So I asked him what shows he liked, he said Bonanza, and I said I had a computer with me and there were lots of Bonanza episodes on YouTube. I asked if he had a favorite, and he said "Hoss and the Leprechauns"... which took about 10 seconds to find. I told him I'd found it, but since it was 2:30 in the morning, we could watch it the next day if he wanted to bring a chair over. That calmed him down considerably, as he'd been swearing at the nurses earlier and they called security on him.
Well, as luck would have it, the next day he had to go for tests and was out of it. And that evening, I was discharged. So we never got to watch that episode, but at least I was able to calm him down. He was a lot friendlier after that, and gave me a goodbye hug when I left.
As for other stuff on YT... there's a treasure trove of videos analyzing the characters and plot points of Harry Potter, and there are some medieval history channels I really enjoy. These are ones in which people re-create things like the food, weaponry, customs, practices, etc. of daily life for people of all stations from the peasants to the nobility. None of them would qualify as CanCon, though. I think the guy who hosts the Shadiversity channel is Australian, the guy who hosts Modern History TV is British (he re-enacts the life of a medieval knight, complete with horses, weapons and armor and has occasional guests to explain and demonstrate things like medieval cooking), and so is the woman who hosts Reading the Past (her specialty is Plantagenet/Tudor history). Given that I'm novelizing an adventure game that takes place in the 11th century and I've also novelized other medieval-era games, the information I learn from some of these channels is invaluable and saves me a hell of a lot of time doing research - though some of what they present does make me want more detail as they can't possibly cover it thoroughly in less than 20 minutes. It also teaches me that most historical dramas get things wrong in ways we don't expect. Using a crossbow isn't as easy as some of the movies make it out to be!
And of course there's my favorite music videos... Greek dancing in the middle of a Toronto market, twice-weekly livestreams of Andean music by Wauquikuna, and some other favorites. There's a lot to find on that site.