Just got my ODROID C2 today and put newest alpha on it.
First issue I discovered, is that I had to turn Hardware-Decoding of to make videos playback. With hardware-decoding I'm getting video for like 5 sec and then it stops and only audio plays. With hardware-decoding off some videos play but some just freeze up the whole device.
There is also an issue with Pass-Trough. I had to turn it off on H264 files to get sound at all, because with pass-thorugh I only got whirring.
Sadly the alpha is not usable at all on the C2 at the moment