Hide the talk sidebar while a live broadcast video is showing to give attendees a more focused layout. The sidebar is shown by default.
Open the public talk page while signed in as an event organiser with page-editing access.
Select Edit Page from the bottom-left page controls.
In the Page tab, find Additional Settings and enable Hide sidebar in broadcast mode?.
The Page Editor saves this setting automatically. Wait for Saved, then select Exit Page Editor. If a save error appears, resolve it before leaving.
This applies only when the talk page is showing the live broadcast video. Replay mode and the normal talk detail page keep their regular sidebar layout. Sponsors that would appear in the broadcast sidebar are instead shown below the main content.