Like what? Call 112/911/999.. and then what? Car drivers here have to pass a first aid course, but that could have been decades ago. Except for waiting 10+ minutes for an ambulance, what do you expect people around the suffocating/dying/bleeding person to do?
Yes, youtube wasn't made for that, neither were phones made for watching videos, but since everyone has a phone and phones can show videos, and videos can show the "first aid with X" video, people will use them for just that.