From everything I've seen, the laws of thermodynamics haven't actually been proven. We know that for macroscopic systems they should be essentially true due to simple probability. However, I haven't seen any proof that an atomic-scale device couldn't reverse entropy. While it's very unlikely that a random youtuber can create energy using magnets, it isn't inconceivable that a complex organic molecule or a small nanobot could reverse entropy. Hell, the proof that Maxwell's Demon is impossible relies on the assumption that the laws of thermodynamics hold anyway.