Hello @Ralph331
If I get requests like this I would never communicate off platform. I confirm to the guest that they can see the details of my property from the description and photos and if they want to check on anything else, not covered in my listing, to let me know.
All Airbnb's verification process consists of in some cases is having a social media account a guest can link to.
I confirm to the guest that it's against Airbnb's T&C to communicate outside the platform (you must be seen the guest was sharing their contact number in a hidden way to avoid Airbnb's detecting their were sharing a contact number).
Guests can identify some properties without a precise address and video content could be used by scammers to help break into your property. I would block them on What's App and on Airbnb.
Sorry you had this experience.