Greetings from Tucson y'all.

Anyone know the yt chan of the fantastic guy who used a musical performance as cover to covertly ultrasound a very important religious artifact? It was a tomb or box, about 5 feet long if I remember correctly. He (and his assistant?) did it standing at the altar of one of the most famous churches on the planet, if full view of the audience watching the performance he arranged.

This same person made a intensely interesting video about the cover of a book from a famous artist, and convincingly demonstrated the artist knew either the meter, the cubit, or the speed of light (my memory) long before they were introduced to the public.

It's in my archive, but after spending considerable time trying to re-find it, I have not succeeded.