Or by clicking on The Unmutal link. http://www.theunmutual.co.uk/ then either click on the "Wonderful footage of sports presenters doing 'It's a Knockout' trailer on Harmony backlot set HERE.. " or alternatively simply click on the "Here" link here. with thanks to The Unmutual.
Then scroll down until you see It's A Knockout - Wanted Ideas for Games Promo 1968 and click arrow button.
Sit back and enjoy.
Be seeing you