Thank you Esav and RR, I was going to make the same comment about the European brown Bear as well as the fact that the bear won. The point of bear baiting was to kill the bear and the odds were usually 4 or 5 to one, even when sent against people with spears. Also, Bear Baiting as it was called, far outlasted the Roman Empire and, was a favorite sport of the mid-evil courts. However, I never heard of using tigers, in fact 99% of the accounts I have studied showed that exotic animals were so hard to come by that Roman's rarely used them more than one at a time. Roman's prefered to see bears fight people and Europeans prefered to see bears fight dogs, sometimes whole packs of Bull Mastiffs were used in European bear baitings.
AS for the video being staged...why would you think a bear who saw an easy meal then got attacked by the momma ( or dad) wouldn't decide it was too much work for too little food and simply walk away instead of fighting? It was obviously well fed and not hungry, had that bear had ribs sticking out it would have probably ate the adult and baby. My point was that it was a huge lion and parents will take extreme risks to protect their young. Also, staged or not it's some of the best close up footage of a Grizzly that I've seen.
David