This and other Max Levitas clips are accessible through Facebook, although they originate with Channel 4. I couldn't find them available directly from Channel 4, but someone in this group may be cleverer than me. I had no idea he was still alive! I knew his brother Maurice well when I lived in the North East.

https://www.facebook.com/Channel4News/videos/the-battle-of-cable-street-80-years-on/10154115601421939/