Sets the label if the user leaves the prompt blank
(no value given)
Asks the guest for a label
Details
&labelsuggestion is the same as &label, except it asks the user still for a user name. If they leave it blank or cancel the prompt asking for a name, it will use the default label.
https://vdo.ninja/?labelsuggestion=guest&webcam
Once the user enters their label, &label=username is added to the URL, so if they reload, they won't be asked again for the label. &label takes priority over &labelsuggestion.