I hate when snakes eat live food in general. We own a reptile shop and its horrid when we get live rats/mice in to feed them. I stay well out of the way but I just hate the idea that the rat/mouse has no chance. In the wild its at a major disadvantage but at least there is a slight opportunity of escape.
Onto the video, I havnt watched it (think its unavailable now anyway), but its really sickening just because of how unnatural it is. A cute little kitten which would never be a prey in the wild totally unaware of the danger it is in. Awful. I do reckon though hes not 'sadistic' but just loves his snake so much and thinks its really cool how it works... deranged perhaps because he felt the need to test how itd tackle a kitten though