Philosophy Tube is pretty good for exactly what you'd expect. The recent stuff is mostly political, but the old stuff is a really good starting point for general philosophy.
And if you're into political stuff and want to actually have your views challenged instead of reinforced, on top of Philosophy Tube I'd also recommend: ContraPoints, Some More News, Shaun, Innuendo Studios, Three Arrows.
Some More News is very much "Here's an opinion you already have, let's be sardonic at the possibility others don't share it". I'd recommend Riley J. Dennis instead, for her excellent discussion of gender and sexuality.
Fair enough. I've used that term because I wanted to represent them as left-leaning "saviors" (as in, opposition to PragerU, Shapiro, JBP, Crowder, and the rest of the shit on YouTube that only reinforces bigotry) without my comment getting flagged.