These buffalo, in this particular event, behaved no different than bison. It appears that the lion had his prey-choice picked out early on. The lion exhibited specific killing execution. A lion or tiger ( it seems ) always kill a large bovine either with a bite to the throat ( strangulation ) or clamp their mouths over the muzzle ( suffocation ). I wonder if a lion would attempt to kill a bear using the same technique as a tiger; a bite to the base of the neck to break the spine?
Bruin - Ursus arctos - Achilles' heel of the big cats.
I believe a single Lion would possibly attempt a bite to the throat or base of the neck on a small bear but not a large Bear simply because a Large Bear would have the ability to just toss the Lion aside. On a large Bear it would take multiple Lions including the pride males to subdue a large Bear to the point where a lion could go for the throat. But.... in the process a 1000 lb Bear is going to do some damage that may thwart the attack all together. Buffalo can't bite back and have no claws with which to fight with.