YouTube fullscreen bug on Brave Android (video stuck in top-right corner)

Description:
I’ve been experiencing a bug on Brave for Android for about a month when using YouTube.

URL: https://www.youtube.com/

When I switch a video to fullscreen, instead of expanding properly, the video becomes very small and gets stuck in the top-right corner of the screen.

Additionally, when I tap the Picture-in-Picture (PiP) button in the navigation bar, the same issue happens — it behaves like a broken fullscreen mode instead of entering PiP correctly.

Steps to Reproduce:

  1. Open https://www.youtube.com/ in Brave (Android)
  2. Play any video
  3. Tap the fullscreen button
    → Video becomes small and stuck in the top-right corner
  4. Tap the PiP button
    → Same broken behavior occurs

Expected Result:

  • Fullscreen should display the video properly, filling the screen
  • PiP should minimize the video into a floating window

Actual Result:

  • Video shrinks and stays fixed in the top-right corner
  • PiP behaves incorrectly, similar to the fullscreen bug

Frequency:

  • Happens every time

Device Information:

  • Device: Samsung Galaxy A34 5G
  • One UI Version: 8.0
  • Android Version: 16
  • Build Number: BP2A.250605.031.A3
  • Brave Version: 1.90.128
  • Chromium Version: 148.0.7778.217

Additional Notes:

  • Issue started around 1 month ago
  • Happens consistently across different videos

Prints:

Update: I just found out that the issue is directly related to page zoom.

When the zoom level is set below 100% (e.g., 80%), the fullscreen and Picture-in-Picture (PiP) bug occurs consistently.

When zoom is set back to 100%, both fullscreen and PiP work normally again.

Additional Details:

  • Tested on 3 different devices — same behavior

  • Issue only happens when zoom < 100%

  • Seems directly tied to page scaling

Can you simply switch to 100% zoom when watching videos?

If you’ve found the solution, please mark this as the solution.

If not, let me know!

Yes, setting the zoom back to 100% works as a workaround, but it’s still a bug. I’m reporting it so the developers are aware of the issue.