I find YT does a gradient ascent into more popular videos. I start out listening to a song with 1000 views, I get recommended 10k view songs, then 100k, and before you know it it's back in the mainstream. There's no way to surf a niche, to hunt in a pile of bin ends. I imagine it's similar for conspiracy stuff. It'll point you in the direction of the most convincing nonsense.
(YT does much more cross-script indexing now than it did when I first started playing around with this, but it still tends to silo by writing system, and if it's relevant search works much better in the original script than relying upon auto-transliteration.)