Where's this rattle coming from?

[mustangenthusiast25]

I've been hearing an off and on rattle coming from the driver side and I took the car to the dealer but they were clueless, so I told them to put felt on the clips and foam on the light switch trim piece, but I'm still hearing it. I'm getting annoyed by it, so any feedback would help.
Here's a clip of it. You can hear more at the start.
[ame]

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[Chameleon]

Most likely the driver side ac vent or bezel.