I find it interesting that he chose to ignore the effects of the previous pandemic and World War I on the market. The market tracked sideways for 30 years from 1890 until 1920 after the war. That era was known as the progressive era, not sure why, and the WWI or the pandemic had practically no effect on the market. But after the pandemic and war were over, we call that period the Roaring 20's. Only the tech boom from 1997-2000 comes close to matching that upward slope.
My current software doesn't track that period, but I'd bet the market made six of the triggers he refers to in his video, where it crossed above and below the 200 day average.
https://i.insider.com/56b28fd46e97c6...jpeg&auto=webp