Video from camera does not rotate on mobile

### Steps to reproduce

On a phone browser, open element call (tested on both call.element.io and call.element.dev) and:

1. Start a call in portrait orientation
2. Rotate phone to landscape

or:

1. Start a call in landscape mode

### Outcome

#### What did you expect?
Camera video is in same orientation as content on the screen

#### What happened instead?
Camera video is sideways (as if always in portrait orientation)

### Operating system

Android (LineageOS 20.0)

### Browser information

Fennec F-Droid 121.0.0 (firefox mobile)

### URL for webapp

call.element.dev

### Will you send logs?

~~Yes~~
There was no option to send logs when sending feedback

Start by reproducing the issue on call.element.dev in Fennec F-Droid using the portrait-to-landscape and landscape-start scenarios described. Trace the mobile camera video orientation handling and verify that the video matches the phone's screen orientation after rotation.

Written by the indexing model from the issue text.