Not sure if this is a rhetorical question.
The dollar's price fluctuates based on its supply (what you described) and its demand (which is much more difficult to pin down). You could make the argument that there is a systematic way of increasing the dollar supply in proportion to the demand, so lets say, a growing economy, larger population, increased foreign dollar usage, etc. That's not what is happening though. As the video explains, with fractional reserve banking and other techniques, the money supply is scaling at rates that have and will continue to cause inflation, as has been aggressively happening since the end of Bretton Woods.
I don't agree with the video though so much that it is "criminal". This is a deep philosophical and economic debate. Keynesians who advocate this shit are sincere in their belief, but I sure as hell don't agree with them. Listen to the shit that spews out of someone like Paul Krugman's mouth. I'm convinced he believes his own nonsense.