[beaglebone] Quickhelp needed: Simplest way to play a video on beaglebone/LCD7 ?

Hi,

What is the easiest way to play a video on a beaglebone with LCD7 ?
Of what format the video has to be ?

Thank you very much in advance for any help!
Best regards,
mcc

PS: I tried XBMC which does not accespt the video (I didnt find any help on this in the net)
    I tried mplayer (without any command line magic) which fails also...