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The DVD version is basically the full Maresnest original video with chapters and newly designed front end menus. The format is SD 4:3 as it was originally shot. The original edit was also 4:3 then a 'letterbox' was applied at the time it seems. The sound and pictures are a straight reproduction from the master tape which is an analogue BetaSP format commonly used in the 80s and 90s. The menus feature a little bit of previously unseen footage taken on super 8 film at the time. It is of course all put together with a lot of love.
There was some deterioration in the master tape over the years so you'll notice the usual kinds of tape dropout from any BetaSP master of that age - but other than that it is as good as it will get.