To add to your point, the futility of copyright enforcement in the digital age created a new industry in the form of DRM and YouTube auto-takedown algorithms.
Enforcement is more pertinent than policy. If their policy allows for such videos, but in practice removes them, it doesn't really matter what their policy is.
Spoiler: US Government spent more money than they had in gold reserves culminating in the breaking of the Bretton Woods agreement with European nations. The USD from 1973 became a fully fiat currency. So yes, if it deals with the US economy after 1970's, as the graphs indicate, it's inseparable from USD inflation most likely caused by government spending.