Not really, most movies on porn sites (why else would you wanna save movies to your computer right?) are streaming, which means it's much harder to keep. You'll hafta find the root directory and gain access to it to find the orginating file, then save it from there.
But if it's downloaded to you computer first then played, you'll have it in your cache and temp internet files.
Most big sites will have a link that'll let you "save as" to your computer. Otherwise, tough luck.
Ah free porn... ya gotta luv the Net.
