Twitch not working when embeded on a different sites such as cytube, works fine on other browsers

[Rikat]

Description of the issue:
For a few weeks now there has been an issue with Twitch playback on websites such as Cytube. When the twitch player is embeded, it will only display a black window. The player will work fine if Popout Player is used.

This issue does not occur on other browsers I have tried, such as Chrome, Firefox, Edge

Steps to Reproduce (add as many as necessary): 1. 2. 3.

1. Create a room on https://cytu.be/
2. Embed any live livestream from Twitch.tv
3. Observe black screen

Actual Result (gifs and screenshots are welcome!):

When popout window is used

Expected result:
Playback from Twitch player functions correctly
Reproduces how often:
100% of the time
Operating System and Brave Version(See the About Brave page in the main menu):
Windows 10 - Brave version v1.80.122 (Jul 16, 2025)
Additional Information:
Tried on multiple devices, got the same report from other people I know who also use Brave.

[Mattches]

Trying to test on my end and having some issues just trying to add the embed to the site. Can you share an example embed link you’ve used so I can test?

[Mattches]

Actually it looks like the following pull request will fix the issue with Twitch embeds:

Use 'Google Chrome' brand in Sec-CH-UA for brave-checks.txt sites

[Rikat]

Hi,

Thank you for the quick reply.

For testing purposes, please feel free to try on the following channels:

CyTube

>implyingsynced

Please note creating an account may be needed if embeding is not permitted.

[FuluBrulu]

Do you need another example?

1. open https://rtirl.com/
2. Click on a streamer
3. Click on “watch (streamername)”

On the right-hand side, the stream and chat opens.
The video player and its controls (play/pause, volume, title, category, …) are visible (if you mouse-over), but the screen is black.

same behavior on Inkognito.

I’m on Brave v1.180.122
Chromium: 138.0.7204.157
OS: Win 11