I think the largest live meal I have fed a snake was a small rat, and that was a long time ago. To the OP, you say your burm won't take F/T, I don't know about that one, I'd have to see it to believe that a burm wouldn't eat anything coming it's way, f/t or live.

I just realized, this isn't even a feeding video, it's a killing video, no eating takes place in that video that I see.