Warning fatigue is a real concern, and requiring people to watch videos on the internet should not be a prerequisite for adequate safety.
I've definitely noticed a proliferation of warning notices and signs in the US (and I don't just mean the Californian chemical hazard warnings in the most bizarre/unavoidable locations like a jet bridge), with the really important ones usually reiterated by a human standing next to them, continuously shouting the same instruction, apparently because people don't seem to take them seriously otherwise.