This should be easy to fulfill, since that is only about 2-3 pictures per second. And any cheap camera should be able to provide that. But honestly, watching a video with 2 frames per seconds of your legs moving will make you sick. You need something in the range of 30 frames/seconds or more.
I would simply use a video camera / camcorder that you can directly attach to a TV. One that has a HDMI out port with a live video stream. This makes the setup a lot easier and reduces any delay introduced by additional computer processing.