fix bug.
optimize app flow.
Use chrome-cast devices to play videos, and the videos is on your phone.
you can use this app to demo your video to everybody.
like family video,your life video.
app only support and play mp4 video.
and app not support static image/photo.
you need buy a chrome-cast devices like: any brand android TV, smart TV with android system support or buy a simple chromecast device.
