The Raspberry Pi is a great device for video playback using its HDMI output. It is popularly used as a HTPC by installing a full-blown media player solution like OSMC (formerly RaspBMC or OpenELEC. What if you do not want such a heavy-handed solution, but just need the ability to play a video file now and then?
OMXPlayer is a command-line video player written specifically for the capabilities of the Raspberry Pi. It is filled with features and can output to the HDMI of the Pi.
$ sudo apt-get install omxplayer
Make sure your HDMI is forced to turn on at boot, as described here.
Shutdown your Pi and your TV. Connect the Pi to the TV using a HDMI cable. Power on the TV first and choose the HDMI input. Next, power on the Pi.
SSH to the Pi and play the video file you want using OMXPlayer:
$ omxplayer foo.mkv
$ omxplayer --help
Tried with: OMXPlayer 0.3.6, OMX Remote 1.9 and Raspbian 7