Created attachment 466691 [details] Screenshot of the bug Safari Version 16.5 (18615.2.9.11.4) macOS 13.4 (22F66) MacBook Air M1 Steps tp reproduce: 1.) Visit a page with an embedded YouTube video, e.g. https://www.macrumors.com/2023/06/13/15-inch-macbook-air-hands-on/ 2.) Start playing the video 3.) Switch this video into fullscreen view by clicking on the []-icon on right bottom corner of the embedded video Actual: The fullscreen video shows the vertical scrollbar/-track. Expected: No scrollbar/-track should be visible. A screenshot is attached. Thanks for checking.
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*** This bug has been marked as a duplicate of bug 255197 ***