That was... interesting. I'm trying to figure out when it's from - the fact that I've never heard of it suggests it's new, but then the style it's filmed in (and the clothing worn) tells me it's from the early to mid 80s. Then again, Jon Lord looks like he's getting on a bit.
A bit of a dog's breakfast though, what with the drum solo in the middle, but then it shows just what an underrated drummer Nicko really is. He doesn't get much of a chance to show off in Maiden these days.