Youtube doesn't go fullscreen, leaving black bars

Browser Support Mobile Support
1

Description of the issue: YouTube videos in fullscreen mode do not occupy the entire screen on my device when viewed in Brave browser. However, fullscreen works correctly on Rumble(in Brave), other browsers(on Youtube) and with locally saved videos.

Screenshot_20250510-145048
Screenshot_20250510-1450481612×720 78.6 KB

How can this issue be reproduced?

  1. Open Youtube in Brave
  2. Turn on any video, and go fullscreen mode

Expected result: The following image is from Rumble website.

Screenshot_20250510-145214
Screenshot_20250510-1452141612×720 95.1 KB

Brave Version: 1.78.96, Chromium 136.0.7103.60

Mobile Device details

Device name: TECNO SPARK 20
Model: TECNO KJ5n
Android version: 13
HiOS version(based on android 13.5.0): V13.5.0(OS13.5-T-P238-240117)

Additional Information

  • The issue is specific to YouTube in Brave.
  • Local video files and Rumble videos use the full screen as expected.
  • The issue does not persist on Google and Firefox