2019 rattle - maybe catalytic converter?

I know 2nd gens had cat conv rattle issues, but have found nothing for 3rd gens.

I’ve noticed this rattle intermittently since about 600 miles when the secondary fan for the A/C was installed. I’ve reported it each maintenance visit and they can never duplicate it. It only does it when I’m in gear and I only notice it when idling, stopped or just foot off brake.
I’m taking it in again tomorrow for 30k maintenance and decided to try recording it. It sat for about 4 hours in the garage. By the end of the video, it quit rattling.
Does this sound like the catalytic converter?

video from Facebook

 

So my old 2nd gen did this and I found it was a bolt with a spring on it where the y part of the exhaust connects to the tail pipe section it was up against the edge of the flange and I just scooted it over with a screw drive and it went away.

 

Well never mind. I think I’ve located it.

 

Check the bolts just down stream of the cat.

 

The dealer ordered a new cat today.