Yes, they told me that as well. He said it causes a harmonica effect, not really dangerous, just noisy.Been a few of these issues reported with transmission mounts in 2020s. DarkKnight noted this in post number 6 of this thread..but the sound description by you did not seem familiar to this issue (and could not be heard on your video).
Glad they got to the bottom of it.
By the way.. for other owners, dealers have stated the vehicle is safe to drive while you wait for the part to be replaced.