I have a Vizio M70-C3 4K TV that I'm setting up to read 4K P3P files off a network drive. I've figured out that the MP4 output from the P3P is encoded using H.264, whereas my TV is only able to decode H.265 MP4 files. I've been trying out different H.265 encoders. I've found DVDFab Video...
I have been using the Note Edge, which is basically the same. Haven't had any app crashes or any other problems. I just got a Shield only so I can have a bigger screen.
I haven't seen the Skyreat one. I have the UAV Bits one which works fine - my only issue with it is that it is rather expensive. A little competition may be a good thing.
Currently I'm using my Samsung Note Edge, which works pretty well. Interested in something larger, but I know for instance that people are having problems with the Galaxy S 8.4. Wanted to see what is actually working well in a tablet.