Well, he will be replacing the hdmi cables with KabelDirekt ones here:
https://www.amazon.sg/KabelDirekt-Highspeed-Supports-Resolution-Suitable/dp/B07CMF1VJZ/ref=sr_1_2?crid=1S84CZON4I610&dchild=1&keywords=dolby%2Bvision%2Bhdmi%2Bcable%2B4k&qid=1606299341&sprefix=Dolby%2Bvision%2B%2Caps%2C315&sr=8-2&th=1