I have 55XE8096 and have same issues as u guys. Plugged 3TB WD external hdd to TV and movies dont look as it should be, its not fluid especially 4k, I tried VLC, Archoc, BSplayer and same on all. Now I use laptop to play movies on tv. Laptop is connected to avr Denon x4000 and goes to tv. Problem is with players its not pass through 5.1. Difficult to find ideal player. Power DVD so far so good but not perfect.