>captain disillusion
dont let the autismal name put you off. He's a VERY talented visual effects guy that rips apart viral videos that are "mysterious" is some way. He paints half his face silver.
>computerphile
A lot less autismal. Very interesting videos about all aspects of computing by university lecturers. Also see Numberphile, same thing but for maths.
>Tom Scott
Various "things you might not know" videos, travels alot, films in cool places. Also has a series called Technical Difficulties, a gameshow of sorts with his university friends.
>Audiotree
if you like finding new music and like live sessions, this channel is the dogs fucking bollocks. Also shoutout to KEXP for similar stuff, though not as well produced.
>DSLRGuide
decent filmography tutorials for beginners
>Grand Illusions
All kinds of toys demonstrated by a posh English toy enthusiast. It really is a good channel though, one of my favourites.