Adds the ability to select an image, instead of a video device
&avataradds the ability to select an image, instead of a video device. The image will trigger when the video is muted or no video device is selected. A default avatar image is provided, but you can select your own from disk.
&avatar=defaultwill pre-select the default avatar, rather than leaving it un-selected.
You can toggle it for the guest's invite link in the director's room:
Choosing the default avatar / placeholder image is activated for the director on default