I humbly disagree with you.
This is not a raging river. It's a creek, and they have a decent amount of gear with them. They appear to know the risks, and judging from their other videos on YouTube, they are actually pretty experienced in the Outdoors. Obviously, the K-Mart Rafts are a poor choice, but they are not going through Class 6 Rapids here... this is Class 2... at best. I might be wrong, but I feel you might be over-reacting in judging their skills and ability to have a good time.
I promise you, they aren't putting your paddling hobby at risk by riding this small Canadian brook on an inner tube.