It's a fake. That is not to say that all manner of protein fails to find use as bait regularly, but that video is from somebody with an agenda wanting to earn money. By the way, Otis "Toad" Smith, the great catfishing guru underwent heart surgery and part of the heart was removed. He asked the doctors for it and kept it in a jar for a while, then decided he should put it to use. So he used the piece of his heart as catfish bait, and caught a dandy fish with it.