I had same problem. I can record onto USB but not use live playback. Emailed LG. They said for live playback you need an external hard drive. Bought the cheapest one I could find and Live Playback now works fine
I now have an issue with what appears to be back light screen bleeding from the bottom corners of my screen on a 49UF6900, particularly when the video is light. Would anyone having experienced bleed on their screen have a solution or does it need a tech to resolve/repair?
mine is 43LG594V
after the software update last week - YouTube appears to be a lot more 'stable'
Lot less 'jumping out' due to; this app will restart to free up more memory
Watched 2.5 hours on Friday - no crash
Watched Coachella over 3 hours on Sunday and it did crash out once.