Why is my smartphone screen flickering?

Question

Android

Flicker Video
Xiaomi Redmi 2 Smartphone
The screen is flickering. It appeared a few weeks ago, but before it flickered very weakly and only when watching videos in the Chrome browser, today I discovered this (appears only in this menu, in which application to open this link. The most interesting thing is that it works when you try to go only to certain sites).
Appeared after firmware on 5 android. Also, after the firmware, the phone began to warm up more and small yellow spots appeared on the screen (they write on the Internet that this glue melts on the screen.
What do you advise?
Turning on the "Disable overlays" item in the phone settings helped.

Answer 1

The inclusion of the item "Disable overlays" in the phone settings helped.

Answer 2

More like a hardware problem.