I just wonder if all of these acts were videotaped at a single performance.  Hard to imagine Olivia Newton John rubbing elbows with a bunch beer-drankin' dope-smokin' southern rockers!  Great clip! 

Thanks for posting this.  I will need to set aside time to watch this tomorrow.  1970s CDB is among my favorite and while I haven't played much MTB in a while, this will be a good time.