Can I use this conferencing to give a video webinar?

Phone.com Video Conferencing was not developed for webinars and it is missing some of the functionality of traditional webinar solutions. However, you can use the Director mode to control what users see and share your screen with up to 24 attendees.

Full webinar functionality, including the ability to auto-mute attendees, chat and Q&A, dashboard and more, is on the roadmap.