YouTube Video Recommendations Lead to More Extremist Content for Right-Leaning Users, Researchers Suggest::New research shows that a person’s ideological leaning might affect what videos YouTube’s algorithms recommend to them. For right-leaning users, video recommendations are more likely to come from channels that share political extremism, conspiracy theories and otherwise problematic content.
It is entirely possible that YouTube’s algorithm doesn’t see you as someone interested in right-wing rhetoric (or perhaps you may have also downvoted such videos).
They explain how it works here (without technical details): https://blog.youtube/inside-youtube/on-youtubes-recommendation-system/