There's an awesome "Primitive Technology" channel on YouTube run by and starring John Plant.

Primitive Survival Tool appears to be copying that content model, but instead of doing the work themselves, it looks like they hired 2 guys who are told to build some very labor-intensive and useless things like a mini underground swimming pool.

I don't think there's something illegal going on, it's just that judging by comments, most viewers don't understand what's going on. I bet TV channels would have hard time running a show like this, but on YouTube everybody assumes that the channel is run by the actors.