MST3K Style Treatment on Youtube!
http://www.youtube.com/view_play_list?p=353FA7AFFE8A33A0&playnext=1&playnext_from=PL
An MST3K style version of the film, with comedic commentary by Garrett Gilchrist. Enjoy it all at Youtube.
Also available at Rifftrax.com:
http://www.rifftrax.com/iriffs/starcrash-1978-riffed-garrett-gilchrist
And at The Pirate Bay.
Another Italian classic, Yor, Hunter From the Future, is available with Garrett Gilchrist commentary as well.
http://www.youtube.com/watch?v=8_L_fkKRUZo
http://www.rifftrax.com/iriffs/yor-hunter-from-future-commentary-garrett-gilchrist