This here's Making Empire, a documentary that aired in 1980 to promote The Empire Strikes Back and was promptly consigned to the pop cultural dustbin. Which is an absolute pity, as this Dutch television special — the first 45 seconds of the YouTube video above are in Dutch, the rest is in English — features some incredibly snazzy shots of Tauntaun puppets and Wampa suits (around the 7:00 mark).
The quality's not spectacular and you can only watch half of it, but it's required watching for any Star Wars fan. You can find more background on Making Empire here. [Via Open Culture]