One thing the video gets right. Monetary policy is driven by expectations. If people expect inflation they will spend now and it will be a self fulfilling prophecy. The Fed could create inflation by just credibly saying they will do WHATEVER it takes to get 2% inflation.
That is perfectly congruent with the Milton Friedman view that inflation is forever and always a monetary phenomenon. Milton Friedman said when interest rates are ultra low you can print a lot of money and inflation won't follow a strict quantity theory of money. Amazing how ignorant all of these economists are of what Friedman actually believed.
https://www.hoover.org/research/reviving-japan
Any increase in the money supply (i.e. the real, effective money supply, e.g. excluding amounts parked impotently in excess reserves at the Fed) will cause some prices to rise, at least relative what they otherwise would have been, regardless of expectations. Likewise, there can't be a lasting price inflation based on expectations alone; i.e. you can't "draw demand forward" forever (cash balances run out eventually, absent an increase in the money supply).
This isn't to say that inflation expectations are irrelevant, they certainly can have an important short-term effect, and they're a good signal for investors, but it seems to me that the focus on psychology is part and parcel of the myth that central banks have been trying and failing to create inflation (which in turn is an expression of the mythical deflation monster). The reality is that the central banks aren't trying to create inflation, at least not consumer price inflation. They're trying to finance states and politically connected businesses; that is why they exist. The very last thing they want is consumer price inflation. The ideal situation for the central banks would be to print infinite amounts of money with no consequences. But, since they aren't retarded, they know that this is impossible. When the central banks start talking about accepting or encouraging higher consumer price inflation, that's them
rationalizing the undesirable (from
their perspective) consequences of pursuing their true mandate. And, yes, I know that the models they use may suggest that higher inflation is positively good for the economy, but those aren't just wrong, they're "superstructure," as Marx would say; the real decision-makers, IMO, who may not even be at the central banks (they may be legislators in important sub-committees, for instance) aren't following the models, they're following the political imperative to keep the vote-buying schemes financed.