A: Hi,
we currently do not offer subdomains. However we heard that wish already several times and definitely will have to think about this.
We offer our video technology as a Software-as-a-Service model (which is the AppSumo offer) and as an API integration, which can be integrated in your software. This is fully customizable but needs to be set-up individualls. More information under https://www.eyeson.com/developers/

My understanding is, that a fixed URL for the meeting room is important - which is also the case with our SaaS offer. The address of the meeting room does not change and all team-members you've invited can re-enter the same meeting room.