That's a good point, the value of the items being shared (either sentimentally or monetarily) has a sway on choices that the video did not address.

As for religion, I don't think it is the only reason people have morals, and I think most animals probably do have some basic sense of altruism, which might be nothing more than an instinct to keep the species alive. What religion does though is attempts to fine tune and manipulate what we consider right and wrong, even if the basic aspects of morality are innate, some things, such as most types of sexual morality, are only seen as "bad" because a given church says so. Even if on some level two gay men, or a fetishist might feel guilty naturally, religion enforces that and uses it to increase the fear, and ultimate obedience to a given deity.