FaceTime camera doesn't work on Mac

[e-caste]

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Steps to reproduce

1. select FaceTime camera as video device
2. video preview is not shown in device choice dialog
3. start video call
4. camera can't be opened

Expected behaviour

Video works as expected.

Actual behaviour

This error is shown at the top right:

I'm pretty sure that I'm not using the camera for anything else, and on top of that the green LED at the top of my screen that signals that the webcam is in use is off.
Also, on macOS there shouldn't be the same issue as there is on other OSes that the same video feed can't be accessed by more than one program at the same time.

Desktop client

Talk Desktop client version: v0.2.1

Operating system: macOS

Operating system version: Ventura 13.3

Microphone available: yes

Camera available: yes

Server

Nextcloud version: (see status page: /status.php) 26.0.0

Talk app version: (see apps admin page: /index.php/settings/apps) 16.0.1

Custom Signaling server configured: yes/no and version (see additional admin settings: /index.php/index.php/settings/admin/talk#signaling_server) no

Custom TURN server configured: yes/no (see additional admin settings: /index.php/settings/admin/talk#turn_server) yes

Custom STUN server configured: yes/no (see additional admin settings: /index.php/settings/admin/talk#stun_server) yes

Logs

Client log

Insert your browser log here, this could for example include:
a) The javascript console log
b) The network log
c) ...

[ShGKme]

Duplication of #50