Can't see fullscreen videos on YouTube

[jonathansampson]

Description

Videos aren't visible on YouTube when viewing in fullscreen.

Steps to Reproduce

1. Navigate to a video (https://www.youtube.com/watch?v=70JIXsey2iI)
2. When the video begins, click the YouTube fullscreen button

Actual result:

Audio, but no video.

Expected result:

Fullscreen video.

Reproduces how often:

100%

Brave version (about:brave info)

Brave	0.53.1 Chromium: 69.0.3497.12 (Official Build) dev (64-bit)
Revision	e8e14b69c41a5a461c15fa5d1065ec28c49890ac-refs/branch-heads/3497@{#54}
OS	Windows
JavaScript	V8 6.9.427.5
Flash	(Disabled)
User Agent	Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.12 Safari/537.36
Command Line	"C:\Program Files (x86)\BraveSoftware\Brave-Browser-Dev\Application\brave.exe" --enable-tab-audio-muting --disable-domain-reliability --disable-chrome-google-url-tracking-client --enable-features=EnableEmojiContextMenu,DesktopPWAWindowing,fill-on-account-select --flag-switches-begin --flag-switches-end
Executable Path	C:\Program Files (x86)\BraveSoftware\Brave-Browser-Dev\Application\brave.exe
Profile Path	C:\Users\jjdsa\AppData\Local\BraveSoftware\Brave-Browser-Dev\User Data\Default

Reproducible on current release:

Reproduces on v0.53.1

Website problems only:

• Does the issue resolve itself when disabling Brave Shields? No
• Is the issue reproducible on the latest version of Chrome? No

Additional Information

Calling the fullscreen method directly on the video element works:

document.querySelector('video').webkitRequestFullScreen()

[srirambv]

Couldn't reproduce this issue on my machine with clean install

[jonathansampson]

I also cannot repro today.