I did watch the video. He certainly does a fine job acting like he knows what he is talking about. Except for he is obviously pushing an agenda and not objectively presenting all the facts and history. He is conflating Fascism with socialism.
The reality is that Fascism was borns as an Anti democratic anti liberal movement. Dictators like Hitler who, yes, practiced Socialism adopted the nationalistic, one party, authoritarian rule that pretty much defines what fascism is. It was the polar opposite of liberal democracies.
If you people look at political ideologies on 1 axis as simply "right" or "left" then you are missing a big part. Ideologies are two dimensional and you are missing the north and south. See the diagram I posted below. The one dimensional thinking are always to going be confused as both the "Left" and the "Right" can use fascism and do use fascism to progress their agendas. In todays world, the Left does it through government control, socialist policies and cancel culture while the Right does it through Nationalism and Donald Trump.
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