according to youtube's sorting of my subscribed channels (sans the ~18 sewing channels i subscribed to last week) my favs are:
Household Hacker (life hacks that are actually useful)
Bad Lip Reading (... that one explains itself i think. watch the "seagulls" video!)
Mario Wienerroither (takes the music out of music videos and adds sound effects :3 very funny stuff)
BriTANick (very,
very funny comedy shorts; they're not uploading much these days bc they have a show now, but their existing videos are gooood)
Good Cop Great Cop (similar to BriTANick, but different)
StopDrop&Retro (gaming hardware reviews (well, obscure handhelds mostly), well-researched videos about scammy kickstarters)
Larry Bundy Jr. (video game lists, and some board game reviews)
mans1ay3r (like Bad Lip Reading, but with video games. very specific kind of humor though; you'll either find it funny or you'll hate it. i sent his "jarl ballin'" clip to a ton of people and got very mixed reactions)
Gemma Stafford (baking/making sweets explained well. if you're a total noob and want to make really good cakes, cupcakes, frappucinos, or ice cream, search her channel!)
tbh i also enjoy buzzfeeds youtube channel (okay, mostly their "tasty" channel), but man you gotta scroll a lot to find the interesting stuff. solid sunday morning "my brain needs a rest" content though