If you want uncritical videos about goofy subjects like monsters and UFO’s, YouTube will hook you up. Look at all the “Flat Earth” videos. Look at them. But if you want skeptical takedowns, you might have to dig a little further, and if you want skeptical takedowns that are well researched and explained, you have to dig a little further still. But Trey The Explainer does the job nicely.
Many of his videos are about paleontological subjects, but many others are about various “cryptids” (i.e. mysterious animals that people “know” to exist but can never seem to prove… Bigfoot, Loch Ness Monster, Honest Politician, that sort of thing). Some are better known than others, but two vids I found quite good are on the Black Knight Satellite and the Ropen. Both are relatively recent inventions; both are manifestly silly; both are easily and quite adequately explained away with clear video evidence showing them to have mundane explanations; and yet, both are readily believed by many.