Due to technical limitation in the Atlassian Confluence Cloud, the native YouTube fullscreen mode is not supported, but our app provides some workarounds to get a similar fullscreen experience.
All YouTube for Confluence macros such as “YouTube video” or “YouTube playlist” provide the following options to define how the fullscreen dialog can be accessed:
YouTubeIcon: Clicking the standard You Tube icon opens the fullscreen dialog.
ConfluenceButton: A button to open the fullscreen dialog is added below the YouTube player.
Disabled: Fullscreen support is disabled.