Musicians love to play the themes from Super Mario games. YouTube is absolutely stuffed with covers using all sorts of novelty approaches. But this is the first time I've ever seen one man tackle all the musical parts and the sound effects while syncing up with a playthrough.
Using the power of split screen, YouTuber samuraiguitarist has put together an incredible recreation of the "Super Mario World" soundtrack. He plays a dozen different instruments on the left side (my personal favourite being the jaw harp) to cover the musical score. And in the lower left corner, you can watch him cover every boink, plonk, bloop and ka-ching using only an electric guitar.
Honestly, the longer it goes, the more delightful it becomes.