By just looking at the thumbnails of the videos I see that Nebula is not the solution but part of the problem. It's the same clickbaity images all over the place.

With regards to being able to find and filter such content, I'm not sure that point still stands. With the various changes YouTube has made, it becomes very hard to see what's good and what not before watching a video or being into the topic and understanding whether somebody is telling the truth and solid information or not.