I’m going to push back and say this is actually still a good move. You’re assuming the weight and fitness videos are created equal, and I can assure you, they are not.
Most aren’t qualified to be sharing exercise or diet information, many are little more than to show off the person’s physique or sell a product, and some offer potentially dangerous or pseudoscientific advice that could sabotage a person’s progress.
Knowing how to spot those problematic videos comes with experience, and I don’t believe teens (in general; there’s obviously exceptions) have a well-developed skillset for spotting bullshit.
So while I agree this is probably a PR move, I think it will still be a positive outcome.