I cant see what the problem is making a video dvd of scene demos at all! There was another one made a while ago by someone else which i downloaded and was a nice little production.
I mean comeon, all the demos are freely (and legally) downloadable from just about where ever you want. Also, this guy obviously spent time working on this, and good for him if he wants to sell it to people looking for a quick nostalgic fix!
Id probably do a similar thing myself if i could be bothered..