You beat me to it. I was just going to ask - porn, anatomy, biochemical processes - what is the OP looking for? If the OP is already a medical student, I assume he/she is not looking for something geared to the lay public. If he/she is a first year, I recommend the Acland gross anatomy DVDs. I borrowed a set of the original DVDs from my mentor but someone had tried to use them to make a bootleg copy and they were so screwed-up that I finally shelled out $165 or whatever it was for the entire set.
Acland won't replace studying, but when I was just too darn tired to sit at my desk and study, I would flop in my recliner in front of the TV and watch Acland. American Idol it's not... but I did feel like I was doing something productive with my time when I just couldn't study any more.