I like all types of video z3cubing makes.
challenges, disassembling and reassembling cubes, how to solve various non wca cubes, etc
I like "can chris solve" videos too, where he tries to solve a non wca puzzle without previous experience
some tingman videos of random cubing challenges are really fun to watch too
videos from hesacuber used to be really fun to watch (specially the one he tries to break skewb world record in one week or something like that)
I don't like the style of videos of cubehead. too many innuendos and unnecessary jokes and heavy editing and I'm not interested in his content at all (just useless stuff lately)
old jperm videos were good, nowadays too much trash. old challenges and theory videos were good
STcuber has the best cubing skits I've ever seen