resume playback youtube video in a container

[agasthene]

Before submitting a bug report

• I updated to the latest version of Multi-Account Container and tested if I can reproduce the issue
• I searched for existing reports to see if it hasn't already been reported

Step to reproduce

Hello, since it seems that facebook takes data from YouTube for certain videos, it is also necessary to put the latter in a container.

So when Yt is put in a container, pro in my case, and I close ff then reopen it later, the video's timings are not memorized and the video resumes from the beginning and not at its last playback point.

I'd like to add that I'm not used to the github system, that my mother tongue is Moliere and that this text is translated.

Actual behavior

Expected behavior

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