The Making of Star Wars/SF FX: The Empire Strikes Back, VHD, CBS/Fox Video, Japan 1984

Yes, even these "making ofs" were issued on VHD. One disc sufficed for these two 50 minute specials.

The VHD discs are hard to find, and when they show up they're usually quite expensive. Their numbers must be pretty low as well, and there is a crossover with collectors of the format in general that hikes up the price. Make sure you get the insert as well.