Must admit, I've never seen the Let There be Rock video. Is it available on DVD?
Unfortunatley its still VHS only, is available on amazon though.
It is really worth getting if you are a fan, IMO the best AC/DC live video. Really captures the raw essence of their music, and even has a cheesy bi-plane / porsche montage in the middle to Walk All Over You :)
{aside}The more I talk about this, the more I am feeling the need for a Riff-Raff. How do they work out for you Phil?{/aside}