The crow hits the bear in the face clearly just before the bear turns away and focus in the easier meal available. The video fades and do not show what happened later but the crow was far from being safe still.

Other possibility would be that the bear was just annoyed by the crowing sound so maybe it was not totally an altruistic conduct. Not easy to evaluate because we lack the first and last part of the scene. How the crow ended in the pool? Maybe was trow there by the bear. We don't know.

> leopard ... would be inclined to save it for later by just caching it (dead) in a tree.

That would be the best way to attract the maximum of flies and predators. Cats are know to play with their preys when satiated keeping them alive as long as possible. It seems that they have a lot of fun with it.