Have you personally tried out this feature yet? What are the recording limitations for video length? I saw a 4k60fps sample on YouTube and it looked really good just that LG's stabilization needs a little work.
..Seem to have got it right and it is stunning at times, but the file sizes are just huge so I'll stick with 30fps with HDR on, which are plenty good enough. The footage is that good it has persuaded me against a purchase for a decent pocket camera for our upcoming Orlando vacation, having uploaded them up to my test youtube site for viewing. Blasts the P20 Pro into oblivion for video!