So after a minute I realized that he had tape on this “canvas” that he was throwing his painted-black baseballs at. Not only would it take a lot of time to get that tape on there like that, but wow, that would take a lot of time to fill the canvas up with black by throwing baseballs at it.
Not only is it time consuming, but that is a messy way to paint. I would have to be out there in a painters outfit, gloves and goggles to accomplish that without looking like a walking canvas myself.
Definitely a nice result once he removed all the tape from the canvas to reveal his masterpiece. I don’t quite understand the burning at the end, but maybe he is just a pryomaniac.