When full screen is active, speaker video is not displayed for attendees

If someone shares the screen, as an attendee while on fullscreen you cannot see the video. If you are a panelist it works well.

Speaker video not shown.

Which Web Meeting SDK version?
To Reproduce(If applicable)
Steps to reproduce the behavior:

  1. Join a webinar
  2. As the host, turn on video and share the screen
  3. As an attendee, click on fullscreen
  4. Host video is lost.


Expected behavior (as panelist using the same WebSDK and app):

Device (please complete the following information):

  • Device: Desktop
  • OS: Windows
  • Browser: Chrome
  • Browser Version: 92

Additional context
It works on Safari and Firefox

Hey @giancarlo1,

Thank you for reaching out to the Zoom Developer Forum. So far, I haven’t seen this behavior. Does this only happen with Webinars? In this implementation, have you enabled Web Isolation?


Yes, Web Isolation is enabled and we can see the Speaker video when full screen is not enabled. The issue only happens when the host shares the screen and an attendee is on full screen.

Meetings work fine, it happens with webinars only.

@giancarlo1 I’ve reached out to our engineering team about this. Can you share any errors in the browser console in the meantime?



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Hey @giancarlo1,

Thank you for your patience here, our team got back to me and indicated this is by design and will be changed with the release of Web SDK 2.0.0.