The recommendation at the end was to "buy, carry, and learn how to use an avalanche beacon."

OK, but what's more important is my buddies. This video proves to me that, unless I have buddies right there, an avalanche beacon provides nothing more than a false sense of security.

Not only should I have buddies, but the buddies need to be educated on how to respond to an avalanche. In this case, for example, if the buddies had not seen where the friend got covered, then the beacons would have been necessary.