On the car front:
Cleetus mcFarland: I have followed his naked Corvette since the beginning and watched it set the first stickshift GM car in the 7-second quarter mile. He is quite humble, goofy, and has a lot of cool builds
Deboss Garage: Humble and very very knowledgeable diesel guy who works on all sorts of projects.
Grind Hard Plumbing Company: If you've seen the really fast Barbie Mustang... they have built so much more since then.
Aging Wheels: He owns a Trabant! And a couple other shitty quirky cars! He's mainly into communist shitboxes and electric vehicles that are a large step down from a Tesla.
Rich Rebuilds: A learn-as-he-goes dude who buys salvaged Teslas and rebuilds them - though he has taken on other projects as of late.
RegularCars aka Regular Car Reviews: it's that. He reviews anything and everything. From Grandma's '93 Cutlass to the Suzuki Cappuccino, and does so with decent knowledge mixed in with some fucked up dark humor.
24hoursoflemons: The guys who run the 24 Hours of LeMons race series do recaps of each race, and said race is basically cosplaying while racing a shitbox car all weekend with a drunken potluck in the middle of it all. It's a bucket list thing of mine.
On the not car front:
The Proper People: Urbexing done right, mainly old factories, asylums, hospitals, and amusement parks. Lately they've been traveling.
Explore With Us: Most of their Urbexes have been ghost towns and such in the Nevada area, but lately they have been doing a lot of missing persons cases, which I fine just as interesting.
Sal: Dead/dying malls and the history of them. he is actually a little daring too, when he does his walk-throughs he sneaks into the blocked off parts.
LGR: Most of what I watch of his are videos about old computers and other gadgets from way back when.
Hydraulic Press Channel/Beyond The Press: Experimental things with a hydraulic press and other various pieces of equipment... spoiler alert: decks of cards literally explode when crushed. He's also from Finland, so that accent is hilarious.
Jeff Favignano: Does a lot of play-through with new games, mostly oddball simulators.
I have a lot more but eh, I just kinda picked a few that stood out.