This was in major theater chains in the 70s. I doubt they had to look too long to find this.

I found this interesting, as I did not know the entire story of Manson and his Family before. I'd say it was a decent overview of what happened.

This copy paste documentary (and even managing to make it worse) is a rip off of the original 'Manson' documentary from 1977. It is available and has been available to watch for years. That one is a great documentary, this so called 'lost tapes' one is not. Funny how it's made by someone who makes Ross Kemp, Bear Gryllis 'documentaries'. Anyway it is extremely dramatized, and -funnily enough- very manipulative.