Currently, the resize event for a PiP window is being fired on the HTMLVideoElement rather than the PiP object itself.
Pull request: https://github.com/WebKit/WebKit/pull/1481
<rdar://problem/95059574>
Committed r295507 (251512@main): <https://commits.webkit.org/251512@main> Reviewed commits have been landed. Closing PR #1481 and removing active labels.