I have submitted the very first usable alpha version of 360Tube and I am now in the process to spiffy it up, work on usability, remove clutter, and try to avoid crashes.
One positive sign is that I am actually using the app myself quite frequent, when I have a new video recorded with my EleCam 360 which I want to upload to YouTube.
However the FileSelector was kind of sucky, so I thought I take a few hours to replace it with a better version. That was about two days ago. I have spend a lo of time trying the available open source FileSelector libraries from github. Unfortunately most of those offered little additional benefit over my current implementation and in a lot of cases I had to spend time to work on making it compile.
I finally came across the super-fine-nice-cool UltraExplorer.
It took me a couple of hours to compile it and made it work inside AndroidStudio however I am now at the point where I can add things together and integrate this into 360Tube. Unfortunately it does not currently support previews for videos so I will have to spend some more time adding this in.
Overall though I am happy with the progress. You can find a sample video from 360Tube here: