"A young wannabe Jedi stumbles across blueprints to make a real lightsaber only to find out that they don't work quite as expected."

David Hasselhoff in space, with a lightsabre and some evil looking droids. From http://www.neatorama.com/2007/04/14/hasselhoff-lightsaber-starcrash/ ...

Ridiculous mod of a Chinese sword fighting competition video with animated light-sabers.

Filmed while George Lucas was signed on as director, but cut after he left the project due to creative differences.

Very funny parody of those "home shopping" knife shows. If I had a choice this would start at the 2:25 mark. You can skip ahead or watch the beginning if you want.