Anyone remember a short doc on Showtime in the early 80's about the late 60's anti-war movement?

I've been trying to locate it. I was a kid in the early 80's and there was a short film montage on Showtime that I think was used as filler between movies. It contained film footage of ant-Vietnam War demonstrations, repeated audio saying "You gotta be left or right" and "Do it!," and the Beatles' "We Can Work it Out" played at one point. Does anyone remember this?