The video and the title effects are really of poor quality for an official release, even for 1979. And the video just shows a plane and a car "racing", then a guy (Bon Scott?) clowning around on a frozen lake, without a scenario. That's why I hardly trust the comment

I'll try to see if I can find the Dvd in the public library: it could also be a bonus in it. Is there a special habit about bonuses, or does the procedure explained in your previous comment also fits in this case?