e.g. there should not be a semi-transparent black background if the only controls are the centered play button (which is before the user has ever interacted with the `<video>`)
<rdar://problem/89927908>
Pull request: https://github.com/WebKit/WebKit/pull/2302
Committed 252362@main (e9db9bafdb8f): <https://commits.webkit.org/252362@main> Reviewed commits have been landed. Closing PR #2302 and removing active labels.