Review: Samsung Rugby Smart for AT&T
The default music player is the newest version of Google Music/Google Play. It uses the newer software and can stream music (that you've previously synced with Google's servers) over the network if you wish. With Google Play, you can also purchase music directly from the Rugby and sync it to your device or leave it in the cloud.
There's also a simple app that can be used to play your side-loaded tunes if you want to avoid the whole Google Music thing.
There aren't any third-party music apps, such as Slacker, Pandora, or MOG on board. You'll need to discover those for yourself.
The Rugby has the stock video player application on board. This player will work with content you've recorded with the Rugby, side-loaded content, as well as any movies you've purchased/rented from Google Play. It's a bare-bones type application, but functions well enough.
If you want to download movies, you can do so from Google Play, as well as from the Samsung Media Hub, which is preloaded. The only other video app on board is the standard YouTube app.