1890695 - Fullscreen video overflows screen in desktop mode

Status: NEW

(GeckoView :: Media, defect)

Description

[Botond Ballo [:botond]]

Steps to reproduce

1. Use an Android device whose display aspect ratio is wider in landscape mode than 16:9. I used a Samsung Galaxy A22, which has a display resolution of 720x1600 (aspect ratio 20:9 in landscape mode).
2. Load a Youtube video with a standard (16:9) aspect ratio, such as https://www.youtube.com/watch?v=TKVYu5Sm5tw
3. Check "Desktop site"
4. With the phone oriented in landscape mode, put the video into fullscreen mode

Actual results

The video is sized to fit the screen horizontally (i.e. the phone's longer dimension), such that the video overflows the screen vertically. I can scroll vertically to bring the overflowed parts of the video into view.

Expected results

The video is sized to fit the screen vertically (i.e. the phone's shorter dimension), such that the entire video is onscreen, and there's letterboxing at the sides.

This is what Chrome does.

Comment 1

[Botond Ballo [:botond]]

3. Check "Desktop site"

Note, it does seem to work as expected in non-desktop mode.