Samsung Galaxy S20 Ultra AMOLED Screen Problem???

Samsung Galaxy S20 Ultra 5G screen issue. My one and only smartphone (that I am using for my Youtube channel)- the Samsung Galaxy S20 Ultra that I got last March 2020, started to show flickering screen with tiny lines around 3rd of April last month exactly 1 year and 1 month since I have the phone. No major fall, with Samsung case ever since and well-cared. With the built-in plastic screen protector since 1st day and just removed it last month 3rd wk of April. Bare screen since then and no scratches observed even up to now. No AMOLED screen burn though only the flickering of screen but as you can see in the video, the worst case scenario happened. It shows a bleeding-like green tint on the upper portion of the screen and the whole screen is white with some patches of green tint. This is the 1st time I encountered this kind of issue in any of my Samsung phones since I started using Samsung around 2011 so it so disappointing It will go back to normal after few minutes but most of the time the flickering