Hi. I have a UE40MU6400 TV and works great except for one relatively new issue. When watching Youtube on the native app supplied with the TV, 4K UHD videos often fail. This becomes more frequent with 4K 60fps video. The video begins playing fine, but after 5-10 mins, the picture begins to go blocky with random coloured noise - usually from the left of screen. This "blockiness" moves toward the right eventually filling the whole screen - at which point the Youtube app crashes and cannot be restarted without switching the TV off/on.
Intriguingly, if I pause the video when the "blockiness" first appears, [before it reaches the full-screen stage] I can scroll forward or backward through the paused video and re-start it and it plays OK for another 5 mins when the blockiness starts again... Whilst this may be a workaround, it is NOT a suitable way to watch videos.
