[Bug]: media playback isn't recorded in iframes

[Juice10]

Preflight Checklist

• [X] I have searched the issue tracker for a bug report that matches the one I want to file, without success.

What package is this bug report for?

rrweb

Version

master

Expected Behavior

Media playback is recorded in iframes

Actual Behavior

Media playback is recorded everywhere apart from inside iframes

Steps to Reproduce

go to https://www.w3schools.com/html/html5_video.asp with yarn live-stream

play the video (it's playback will be synced)

go to https://www.w3schools.com/html/tryit.asp?filename=tryhtml5_video with yarn live-stream

play the video (it's playback won't be synced) // <= broken

Testcase Gist URL

No response

Additional Information

No response

https://user-images.githubusercontent.com/4106/190846530-e827306e-5e13-4321-9a38-ba23fff751ec.mov