Wink capture snapshot of screen into many image file and use flash to show all those images one after another one.
You capture the whole desktop, that will also increase the total file size.
You can select the screen area you want to capture and set the number of frames to be captured per second.
More frames per second will give better quality, however, it will increase the total file size(proportional to number of frames per second).

You can edit captured image when you are done with the capture.  i.e. delete some images, add some text or button...