It's a two minute video of Bernie Sanders speaking in Iowa. He is reaffirming that the common citizens of the US can still stop what's happening now in the US.

Here's some more references, not from Sanders, that can help with context.

https://www.sophiakang.com/what-is-anarchist-calisthenics/

https://www.thecut.com/2020/09/what-exactly-is-mutual-aid-how-to-get-involved.html