I remember reading about it in Kerrang!
This;
"Jon Lord discusses 'Hush'"
"Hush (Playboy After Dark, 1968)"
"Jon Lord discusses arriving in the US for the first time"
"Jon Lord discusses miming for German TV"
"'Speed King' (Vicky Leandros show, German TV, 1970)"
"Jon Lord discusses the writing of 'Child In Time'"
"Child In Time (new clip)"
"Jon Lord discusses the power of 'Child In Time'"
"Jon Lord discusses the recording of 'Black Night'"
"'Black Night' (classic 1970 video clip)"
"Jon Lord discusses 'Fireball'"
"'Fireball' (German TV performance on Disco ZDF, 1971)"
"Jon Lord discusses the Fireball album"
"Jon Lord discusses the writing of 'Strange Kind Of Woman'"
"'Strange Kind Of Woman' (Top Of The Pops, BBC, 1971)"
"Jon Lord discusses 'Demon's Eye'"
"'Demon's Eye' (Music Today, RBB Berlin)"
"Jon Lord discusses 'Highway Star'"
"'Highway Star' (Beat Club, German TV, 1971)"
"Jon Lord discusses 'Never Before'"
"'Never Before' (Classic 1970's video clip)"
"Jon Lord discusses 'Smoke On The Water' and the story behind it"
"'Smoke On The Water' (Hofstra University, 1973)"
"Jon Lord discusses the choice of singles"
"Jon Lord discusses 'Woman From Tokyo'"
"'Woman From Tokyo' (new clip)"
"'Made in Japan' / 'Space Truckin (new clip from Made In Japan footage)"
"Jon Lord discusses 'Burn'"
"'Burn' (London, 1974)"
"Jon Lord discusses 'You Keep On Moving'"
"'You Keep On Moving'"
"Jon Lord discusses 'Stormbringer'"
"'Stormbringer' (new clip)"
"'You Keep On Moving' (new clip)"
Thanks, Wikipedia.