Don't worry this time there is no hard-to-fix problem with my computer!

Ok here's what I'm asking:

I am currently at boarding school and someone has been stealing from people, to catch him myself and a couple of friends set up our web cams to catch him in the act. We caught him taking stuff from our rooms and have a video to prove it .

the only problem is that its hard to tell what is happening because the program only captured one frame per second, so its kind of jumpy. Does anyone know of any software which can smooth all of the frames together a bit?