Sorry
This video has been rigged.

After the hectic and fuzzy scene when the hunter is nailed,
note that the lion's hind legs are stiff, he is dead. The finishing shot is just for cheating even more. A fighting lion is keeping himself atop of his prey not crouching under it.

In my opinion, the hunters downed the lion at very close quarter (a couple of inches), then one hunter lied on the lion and arrange the mouth of the lion to look bitten.Note also that he isn't kept in the claws of the lion.
RIGGED