Yeah, that's essentially the same vibe photos have when taken with a $1000+ DSLR/mirrorless lens that's been dropped, sending one of the glass elements inside out of alignment and/or cracking one of them entirely.
I think a few seconds of the OIS mechanism going wild likely doesn't do any damage, but if you let it continue to vibrate while you sit there puzzled and observe it, flip the phone over and look at the lens, put it up to your ear to hear the noise better, etc - that's plenty of time to self destruct either the mechanism that enabled focusing and/or the lens elements themselves.
This will probably be case by case, and it reminds me exactly of the Boot Camp bug with the 16" Intel 2019 MBPs when they first released. If you installed Boot Camp and went into Windows 10 during the first week or two of the notebook's release date, there was a high chance the speakers would emit an insanely loud screeching noise due to a boot camp driver bug and there was a good chance the speaker driver was then blown, requiring (at the time) a full replacement of the whole MacBook Pro.
So with this, I think it's likely that opening Snapchat, seeing the issue and quickly closing the app does no damage at all - vs like what Luke did in his video where he got it to happen, filmed it, observed it, flipped it over so the viewer could see the camera unit shaking, etc. That's a lot more violent shaking time.