Youtube deliberately ruined their search engine earlier this year. Ostensibly in order to discourage misinformation about the Coronavirus, they changed it to push "credible news sources" for anything regarding current events. So now whenever you search for any news, political issues or current events, all you get are videos from mainstream corporate and government news channels. It's basically become another version of TV.

You used to be able to find raw video of things like controversial police shootings. Now they hide those completely and they only show you TV reports where they tell you their opinions accompanied by highly edited snippets of the videos.

They will still host a lot of the videos you want, but they won't let you find them. The links have become samizdat you must find by word-of mouth on forums and such, as if we've gone back to the early days of the Internet before effective search engines ever existed.

Sometimes you can get around it by sorting by view count rather than relevance. But you have to do that manually, and it only works if the video you're looking for is popular.