Captain Disillusion
Media
https://www.youtube.com/@CaptainDisillusion
Overview
Alan Melikdjanian, in silver face paint and a cape, debunks viral videos: the levitating man, the impossible basketball shot, the ghost in the hallway, the perpetual motion machine. Each episode explains, with his own visual effects, exactly how the fake was made, and the effects work is usually better than the original. The channel's motto is "Love with your heart, use your head for everything else." Episodes are infrequent, because each one takes months to produce.
Notes
The only channel on this list that teaches scepticism by demonstration rather than argument. Seeing how a convincing fake is built is the best vaccine against being fooled by the next one, and the Captain's recurring point, that the question is never "could this be real?" but "how was this made?", is a good habit for far more than videos. He is also, despite the costume, scrupulously fair to the people he debunks.