Review: Samsung Conquer 4G
Music
The Conquer 4G uses the stock Android media player. It's bare bones, but it gets the job done. You can sort through your playlists, artists, albums, and songs easily enough, and album art comes through properly when tagged to the music. The media player can be sent to the background while you do other things such as browse the web or check Twitter. It goes without saying that the music player has a decent widget for the home screen, as well.
There are no third-party music applications preinstalled, such as Slacker or Pandora, though they are easy to find in the Android Market.
Video
The Conquer 4G has minimal video play-back features. Only the stock Android video player and YouTube player are on board out of the box. I found that the Conquer 4G handled side-loaded content (movies that I placed on the microSD card) just fine.