https://www.bitchute.com/video/8btLwwCfVuyu/
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This information is not new and many economists have been preaching this for years, but the caller does a good job of condensing the message.

I listened to a few minutes of this, but I need some backup on the information presented. The caller said, if I understood correctly, that the entire money supply was increased by 20 percent in the fall of 2019? That's quite a claim. I am intrigued, but would like to see proof.

Go to Federal Reserve Balance sheet.  When they increase assets, the money supply increases.  Chart shows = Since last Feb 2020, their assets have increased 100%, (in one year!) from 4T to 8T.  This is epic.  As one economist said, the Fed is buying it all (stocks, bonds, etc).  Why else would the stock market keep breaking records when record numbers of people/businesses aren’t working?

but I am curious that she connects this situation to a crash in the repo market in September of 2019. That's the part I was unaware of, that I would like to know more about.

That was the point where the accuмulation started to become the avalanche. The tipping point, thus, the international central Banksters released the COVID virus to deflect blame from themselves for destroying the global financial system while enriching themselves. They colluded with China to be "patient zero" because China knew it would abruptly halt the Hong Kong protests and, ultimately, undermine the U.S. economy and political stability (to avoid the virus, do mail-in ballots that were pivotal in the election fraud). The Banksters have too much invested in the wealth transfer from the U.S. to China in the past 30 years for it to end by Trump's policies. That's one of the reasons they installed Biden.

The "ghost cities" in China are to house the survivors and ensure continuity of their economy and manufacturing in the event of WW3 that wipes out much of the infrastructure and people of key nations around the world. Biden will stand down to a Chinese invasion and attack. It's preplanned. Russia will likely strike China.