EDITED ***Working Both 2160-YUV420 and 2160-RGB*** after PS4 Pro patch update for LG 4K TV's

Very strange .  LG report that they are looking at HDR Game Mode for UH models but it was only OLEDS that were getting the HDR Game Mode to start.  Maybe it  has been pushed out to yours and some UH sets las a trial tester?  Remember they do , do that.  That's how I got my update (unannounced) back end of November. How's your lag input?