Choose the highest values (64x, 32x, 16x) if you are speeding up a video of something incredibly slow: a sunset, or a snowman melting, or a plant growing. Use 8x or 4x if you want to fit something fairly slow into a much shorter span of video time: a snail crossing a driveway, or a group of people building something. Speed the video up 2x—double the original speed—if you want to speed along a regular scene without losing clarity, or if you want to minutely adjust a clip of something slow. If you decide that you want to slow down the video, use a small value: 0. 125x, 0. 25x, or 0. 5x.
Windows Movie Maker does not have a more precise speed-increase effect than the doubling tool. If you want to do something more advanced, you’ll need to find another video editor.
Try right-clicking on the timelined clip, then selecting “Effects. " You should be able to see the effects that are currently applied to this clip, and remove any effects that don’t fit your purpose.
