I agree with nozqh, all i seen was a person feeding their fish. The fact is live feeders are now a part of aquaria more than ever. Feeding live feeders to your fish isnt mean, its another source of food, so the fish doesnt become dependant one one certain food source. It's no different than feeding your fish brine shrimp, brine shrimp is an animal too just like live feeders are, but we look at brine shrimp differently because why? Because they're mainly frozen, but it makes no idfference because brine shrimp were living animals at one time right.
Now I would understand if he posted a video of say a live mouse being tossed into a piranha tank, but it's a video of feeders, which is a common source of protien that hobbyist feed to their fish. I see it this way, fish in the wild eat other small fish right, do see someone running around your local lakes throwing in pellets to feed the fish? Of course not because we would think the person has lost their mind.