Good youtubers to check out for this stuff (in no particular order) are:
* Peter Coffin
* Thoughtslime
* BadMouseProductions
* Mexie
* ContraPoints (or at least.... some of her stuff)
* GwenNoFear
* Kat Blaque
* anactualjoke
* PhilosophyTube (also the host is SO hot ^^;;)
* TheRulesOrg (actually funded by george soros lmao but good stuff)
* Xexizy
I don't endorse everything these ppl believe and many of them disagree with each other, but they do good explaining Theory concepts