Generally speaking I don't make or view videos of captive live feeding since I feel these videos promote the wrong kind of interest. Note that nearly none of these videos are about how to safely feed live; they're only about the strange fascination of watching something kill something else.
That being said, it's kind of hypocritical of us as a community to shame people who occasionally feed a snake to another snake since, as others have said, the mice, rat, and rabbit communities feel the exact same way when we feed our snakes and we brush them off more often than not. I personally might prefer the snakes be killed before such a feeding, but I'll also admit that euthanizing a snake isn't the easiest or cheapest way to go, and I don't even know if these kinds of snakes would be willing to eat a dead ball python.