Don't know about a video tape but I would say try contacting Flysurfer,
I've always found them really helpfull and got a CD-rom with my Mastair that has loads of photos and vids on it, maybe you can get that from them.
More good tips here:
You can find the stuf we've written in the forum by doing a search for Flysurfer or Mastair or Warrior, etc.
If you've got any specific questions just chuck 'em on the forum.