Yep, I also like the part where he claims that he usually eats 100lbs of meat at one sitting and 200 lbs a day. A lion can gorge itself after a kill and eat around 80 pounds of meat in one sitting. But then it wouldn't eat for several days.
Zoos typically feed lions (and tigers) from like 4 to 10 pounds of meat a day. A liger simply cannot consume 200 lbs of meat a day, nor could anyone afford the upkeep on such an animal.
Yeah, and the 50 mph thing is ridiculous. I'm 100% certain they've never actually tested this. And animal speeds are always exaggerated. I saw them test a cheetah on Myth Busters or some show like that a while back--having it run after a jeep. I think the cheetah got up to 50 something for a burst--that is an animal that is at the evolutionary limit for mammalian speed. Everything about it is adapted to be super fast.
A liger, if they had to live in the wild, would be an ambush predator--like a tiger, and probably pounce on really big, really slow things, like, oh, a hippo. The legs are way to short relative to the body for that thing to run fast--I'm guessing it is slower than a big Siberian tiger, and certainly way slower than a lion.
That said, it is still a damn impressive cat, around the size of some of those wicked ice age saber toothed cats.