Looks decent, but a few suggestions.
Try to stretch your video to 1280x720 with a decent codec (MP4 or H.264 is preferred) and upload it (from the original video you took using Graal, not the one you used to upload).
It'll be larger, but if you do it right, it will be in HD, and look something more like this (click the video twice, then click the "HD" button"):
Also, you might want to zoom in a bit so people can see what is happening better. You can do this in almost any video editor (though Windows Movie Maker is pretty limited, I'm not quite sure if it can or not) or in Graal's options.