Most games need to be patched to take advantage oh hgigI tried HGIG with MK11 and noticed no difference with DTM off. When calibrating the HDR on the PS4 in the video settings menu, do you have HGIG on or off?
With hgig on, dtm is automatically turned off. According to HDTV test, only no man's sky works with it. (I also confirmed on Twitter that the info in the video is still accurate in regards to games supporting hgig, only no man sky has the current algorithms in it as of October 2019, no other games were patched yet)
They do state to leave hgig on because there are planned patches coming from sony & I was told by Xbox insider staff that hgig will be rolled out to Xbox one and some games have it already (gears 5 & outer worlds) although the system doesn't recognize it yet.
TV - LG C9, C8 & C6 - AVR - Pioneer SC-LX502, Xbox One X, PS4 Pro & Switch