Meet fails to access the USB webcam when using Brave browser

meet does not recognize my webcam when using the browser “Brave”. Works well with “Firefox” and “Chromium”.
The webcam : Logitech HP Pro Webcam C920 (046D:0892) connected to an USB port.
OS : Ubuntu 18.04 LTS
Hope this helps.

Brave works, Vivaldi too. Both need some “help” to detect the hardware by clicking the gear-icon in Jitsi

many thanks for your answer.
As a matter of fact, the “help” you suggested seems to be not sufficient :
the settings/Devices section shows that the camera has “permission not granted”. However in Settings/Privacy and security/Site settings the permission to use camera and microphone is set for the site
Thanks for your help.