I don't agree that health and safety labels plastered all over common tools purchased these days is the equivalent annoyance to releasing popular culture how-to videos on soda can melting.
Rather than text disclamers, proper explanations of what not to do and especially, why not, should be included in this kind of supposedly instructive foundry practice video, seemingly aimed at teens.
Proper explanations aren't mere disclaimers, and very important to an audience, not just an amateurish attempt to avoid responsibility. Here, every problem is minimized, and fast talk eases the way to what is essentially a popularity sell for the narrator. Then some afterthought warnings to "use common sense" are tacked on, probably to deal with viewer complaints, and the guy moves on to a new video subject.
A similar clown is the guy who does the greepowerscience videos.