YouTube video issues

I’m experiencing two issues with YouTube on the Brave browser on my Samsung A12:

  1. Screen Timeout Issue: The screen turns off automatically when not interacted with while watching videos in full screen or half screen mode.
  2. Scrolling Issue: When scrolling through videos on the YouTube homepage, the screen exhibits abnormal and rapid flashing, making it impossible to select a video.

Despite having updated apps, these issues persist. Can you provide a solution to resolve these problems?