Ritchie!..... what else can you say.

I think the skill of Deep Purple, was not only to be a great live performer or composer of historic hard rock pieces, but to blend Jazz, Classical and Heavy Rock, with incredible simplicity and bringing the power of their music to a level that no other band has ever achieved. Now you are ready to listen the best live album ever recorded: Live in Stockholm 1970 ;-)

There are a couple of longer videos of Wring the Neck floating around the internet, although all are edits from a track that could run up to thirty minutes long in concert.