First things first a video animation is basicly looks like a scene from a video but is saved as a .gif
Step One: Find a video. I took Steamboat Willie that is saved on my iTunes but you can use any video.
Step Two: Find a scene in your video you want to animate.
Step Three: Every second of that scene take a screen shot (using the Prt Scrn button) then pause the video (trust me its possible to do that in a second)
Step Four: Paste the screen shot in paint in any program you use. Then crop it.
Step Five: Put the image in an animation program.
Reat Process untill the scene you are animating is over.
This is my first Video animation: