We can play uhd content from USB if the bitrate is below 20mbps
& also only if resolution is 3840 X 2160p
If the resolution is of 4096 X 2160p it shows unrecognizable file format.
& Many times 8 bit videos of below 20 minutes of size greater than 500mb shows unrecognized format.
Smart share could also improve playback of songs library & good photo slideshow .
Problem with photos is , It takes too much time to load next photo & while playing slideshow , next photo loading symbol is also shown