What is the difference between Group Video and Presentation

The Group Video option allows multiple organization and attendee to participate in a group video.  In the Group Video, all users can see and hear each other.  Text chat is also available, and recruiters have the ability to share screen with everyone. 

In Presentation style ("Webinar"). Only presenters have audio and video capabilities, and the candidates will only have text capability.  Recruiters will have the ability to share their screen.

In both Group Video and Presentation calls the Chat is open to all.