Live feeding is a huge no no if you value the health and welfare of your snake. Mice can bite your snake and take out an eye if the strike is wrong, and can pass parasites to them. And filming the death of a small scared critter is just plain icky, imo.
Rats are even more dangerous.
Edited to add, any mouse over fuzzy size can fight back and bite. Frozen thawed is healthier, safer, cheaper and more humane on every level. Plus snakes have slow metabolisms, they really only need one prey item a week at the most or they can get fat. And fat snakes die young.