Question about Kiyo - 540088

I've had the Razer Kiyo since today. As soon as I tried it out and adjusted it, I noticed extreme grain (visual noise). I searched YouTube reviews directly, but no one mentions it as a common shortcoming and the test videos also look clear and without grain. I tried all settings and also tested with a lot of light in the room. It is very annoying on the eyes. Is this a software problem or could it be a hardware problem? As is usually the case with monitors, defective pixels or colours that are not correct.