Vimeo video goes black if you hit the in-website play button while the video is open in PiP
<rdar://problem/107592139>
Pull request: https://github.com/WebKit/WebKit/pull/12520
Committed 262723@main (12441d93d8c3): <https://commits.webkit.org/262723@main> Reviewed commits have been landed. Closing PR #12520 and removing active labels.
Re-opening for pull request https://github.com/WebKit/WebKit/pull/12527
Pull request: https://github.com/WebKit/WebKit/pull/12529
Committed 262730@main (03a2896731b0): <https://commits.webkit.org/262730@main> Reviewed commits have been landed. Closing PR #12529 and removing active labels.