Macbook Pro Graphic/Display Vibrating When opening lots of browser or Watching Video for too long

I owned Macbook Pro 2017, I bought it about a month ago and I notice that when I watched videos too long on Netflix, reading too long, or opening lots of browsers the graphic simply shaking. However, the HUD above didn't get affected. When I closed all the apps and leave it on the desktop the shaking or vibration would go away but when I started to do things again it would reappear. I did try to update the OS but it still the same. I never opened the hardware, drop the MacBook or drop water on it.