1. A method of providing a user video signal to an online conference, the method comprising: receiving a live user video signal from a camera device, the live user video signal defining a field of view; automatically identifying live initial content of a presentation region within the field of view and live initial content of a privacy region within the field of view; and generating, as the user video signal to the online conference, a modified user video signal based on the live user video signal, the modified video signal including (i) the live initial content of the presentation region within the field of view and (ii) modified video content in place of the live initial content of the privacy region within the field of view.