Yea I remember that interview.
The guy had hair a bit like Brian's and said he'd travelled 8,000 miles following them and Milton Keynes was his 23rd Queen gig. He also said that he'd met Freddie in Leeds.
The interviews with Brian and Roger appear in a more edited form on the On Fire DVD. I remember Brian saying that South America was easier to play because in this country UK the temperature drops when the sun goes down nd cause tuning problems. There WA also an interview with Rick O'brian their stage manager at the time