Frame Rate

If you think of video as a series of pictures shown in sucession, the frame rate (measured in fps) is the number of pictures that are shown in a second.

The higher the frame rate, the smoother the video is.

Common Frame Rates
 * 24fps - Film
 * 30fps - NTSC video (interlaced) (approximate)
 * 25fps - PAL video (interlaced)