For me it would have to be live feeding.I believe that there are cases when live feeding is necessary, but to me most of the snakes been fed live food on You Tube is for pervert pleasure of the owner and viewers. Most of the species shown could be converted to frozen thawed or freshly killed. Then they try to justify it by saying that its what they would do in the wild, and this is true but these animal are now in captivity. If indeed snakes need to be live fed why film it. When i see these videos it tells me more about the person making them, than anything about keeping snakes. With a few exceptions.
It's as if they keep snakes just because they think it's 'hip' or for some misguided 'rock 'n' roll' pose. Well it isn't hip or rock 'n' roll to show off with reptiles in such a cretinous manner.There's always metal music playing and a firey/spikey/skull logo. I don't know how anyone can feed live other than as a last resort, let alone watch it for entertainment. I feel bad for feeding live insects sometimes!