i am using iframe inside CKEditor but fullscreen button is not working. i have check nowhere height or width is specified i have set max-width:100% & max-height:100% i have check inspect element i am getting below <iframe frameborder="0" scrolling="auto" src="https://videos.xyz" allowfullscreen></iframe> <iframe id="kaltura_player" src= “https://videos.xyz” width="100%" height="100%" allowfullscreen="" webkitallowfullscreen="" mozallowfullscreen="" allow="autoplay *; fullscreen *; encrypted-media *" sandbox="allow-forms allow-same-origin allow-scripts allow-top-navigation allow-pointer-lock allow-popups allow-modals allow-orientation-lock allow-popups-to-escape-sandbox allow-presentation allow-top-navigation-by-user-activation" frameborder="0" title="Kaltura Player"></iframe> any solution to enable fullscreen