Nice talk, I wish there was more time at the end for him to talk about his ideas for mutually beneficial "arrangements" like the one idea of crows picking up trash after events etc.
Dolphins cleaning up the oceans?
But why do we have to train them to clean garbage? Can we know if they would really want to do it? Would that define their life, their purpose of existence? Are we just aiming at a crooked adoption of "survival of the fittest (read fit == helpful for human existence)"?
Imagine what would have happened if animals were as evil as humans.