Searched for "Machine Head Live"... had to add keywords "Deep Purple"...

[Zzzptm]

This is what happens when bands name themselves after monumental albums... I had to use "Deep Purple" to get the 1972 Copenhagen show video instead of a more modern band playing Wacken...

I like this video because Gillan stops singing a little, not because he forgot the words, but because he's telling a guy in the audience who's starting stuff that he better cut it out.

The interaction starts with an "OI!" at 3:37. Love it!