Did you do that with movie maker?? If so, very nice. Most of my stuff winds up in the recycle bin, so I don't even try to make videos.
I started with Movie Maker a few years ago, but now I use Sony Vegas. If you're interested in purchasing the software, I wouldn't recommend going with Pro or spending extra money to keep up with the latest version.
Pipcard: I post my videos on Reddit, and in the 'space' subreddit they last longer and usually get more views. For other videos, however, like Sea Offensive, it may take years to break 1000 views (if ever). If I make a non-historical video, they get fewer views.
EDIT: I forgot to mention, the dot that represents Voyager as it passes by Callisto at 1:25 is actually from a picture of Jupiter I took (the dot is Ganymede, I believe).