idk know if he is dredging ,seems to be foolish if he is and he put it on youtube. there is a series of his videos I watched but that one reminded me of the gold coins in found Sonora.
It seems to be a few close up shot of this coins show no wear, no dents ,no rounded off letters edges ......no wear and tear from 150 years in river filled with sand, stones, tons ' of water yearly.....im a skeptic ,seems the guy said 'CHARTER IN HIS VIDEO ,he is charging a"tour" fee?