Did you check your headphone jack?I have managed to get videos to play, though no sound on my system
hdmi_group=1
hdmi_mode=4
in my config.txt results in the sound automatically going to the headphones.
OMXplayer 3.7 worked with the newest version of Quirky arm.
It allows the sound to be routed to the TV or the headphones.
Available at http://www.mydrive.ch
User: porteus@don570
Password: porteus
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