This was recorded in Cleveland for a radio broadcast; the tape became available as a bootleg and is known as one of the most important ones in the band's history.
It's the first-ever recording of "Fly by Night" and only their third performance with Neil. We can hear snippets of what would later become "By-Tor and the Snow Dog" in the Working Man solo.
A quote from Geddy regarding bootlegs:
A lot of people say 'It takes away from record sales' but [...] the fact is that any fan who buys a bootleg is still going to buy your record. So, who is it harming?