When you join a webinar as a panelist without signing in to the RingCentral mobile app, your video remains off even if you choose to join with your video turned on. This also occurs even if the webinar host allows panelists to turn on their videos.
Affected environments
RingCentral Webinar.
Resolution
You can manually turn on your video after joining the webinar by using the Start video button at the bottom toolbar in the RingCentral mobile app.