[iOS][Youtube][Desktop site mode] After LAST UPDATE Youtube Videos can't be made Fullscreen while in Desktop site Mode

[selfmadebuba]

Description

iPhone (iOS 26.6)
After last Brave UPDATE Youtube Videos can't be made Fullscreen anymore while in "Desktop site Mode"
It worked before last Brave UPDATE

Steps to reproduce

1. Open Any Youtube video on iOS
2. click Request Desktop site (may be little different wording in English version)
3. Youtube reloads
4. click Fullscreen button
5. you will see "Your browser doesn't support full screen"
6. It worked before last Brave UPDATE

Actual result

"Your browser doesn't support full screen"

Expected result

Brave Should go Full Screen like it did before last Brave Update

Reproduces how often

Easily reproduced

Brave version

1.92 (144)

Device/iOS version

iPhone 16 plus
iOS 26.6

Affected browser versions

• latest AppStore
• latest TestFlight
• previous TestFlight

Reproducibility

• with Brave Shields disabled
• in the latest version of mobile Safari

Miscellaneous information

It is crucial problem because Brave in "Mobile Mode" don't display Youtube description, youtube chats, youtube comments, NOTHING. Displays only video.
Youtube page id renedered properly in Brave ONLY in DESKTOP MODE so it is crucial for Desktop mode fullscreen to work

[Brave-Matt]

+1 https://community.brave.app/t/your-browser-doesnt-support-full-screen-ipad/656554

[Brave-Matt]

+1s https://community.brave.app/t/youtube-errors-when-trying-to-go-full-screen/656149

[Brave-Matt]

https://community.brave.app/t/bug-ios-youtube-desktop-site-mode-after-last-update-youtube-videos-cant-be-made-fullscreen-while-in-desktop-site-mode/656563

[Brave-Matt]

https://www.reddit.com/r/brave_browser/comments/1velzd7/youtube_screen_not_working/

[kylehickinson]

This is also happening when using Safari and Chrome so seems like an issue on the YouTube side

[selfmadebuba]

Why Brave do not display Mobile version of youtube correctly?- there is only video without any youtube UI