Build an Online Presentation System with Python, JavaScript, and Twilio Programmable VideoRemoved

The presenter user interface displays a button to start presenting, while the attendee user interface displays a button to join the presentation. The screen sharing functionality is only available for attendees. When an attendee clicks the "Join" button, they are connected to the video room and can view the presenter's tracks. If the presenter leaves the video room, the attendee receives a notification that the presentation is over.