BBC - Festivals Britannia.

Here is a documentary from 1979 on the origins of The New Wave Of British Heavy Metal by Danny Baker and featuring Iron Maiden. Since this program was made "at the time" and is not retrospective history it's probably as close to being a factual account as it is possible to get:

Metal Evolution - Progressive Metal (Sub Español)

Anyone (in the UK) who caught the "It Was Alright in the 1960s" programme on Channel 4 last night will have seen the footage of the Shulman brothers being besieged by "permissive" young girls at a Simon Dupree and the Big Sound gig in the 1960s. Curious as to the context where the band allowed themselves to be filmed snogging, signing breasts, allowing some of these adolescent girls into their dressing room and "giving them a lift" in the group's transit van after the gig, I have tracked down the original BBC Man Alive report - a documentary called "Ravers" (read: "groupies", but in actuality just female fans) from 1967, which was a typically sensationalist (and condescending) piece that the BBC programme became infamous for. The Shulman brothers aren't as exploitive and immoral as the editing of the Channel 4 program suggests, or the Man Alive reporter tries to portray...

Edited by Dean - September 20 2015 at 05:46

Spinal Tap

If you guys can understand portuguese, this is a good video on Brazilian Prog Rock. Sadly, there is no perspective on making a full lenght documentary or putting subtitles.