I would like to install a media player, but I don't know what players are available to install. I have tried to install VLC although it does not work. I am using Debian squeeze.
Regardless of distribution, if you want a media player then use OMXPlayer.
It is still the only media player that offers full hardware accelleration (as far as I know). Anything else will provide choppy video playback.
Also, it might be useful for you to know that the Debian Wheezy beta has OMXPlayer installed by default.