I've seen this Greg Hunter video, yes. He usually makes some pretty good points.
One thing to keep in mind about the Coin Re-set Theory, everyone....it doesn't involve the internet, or the electricity grid, the ATM, or the banking system. These are all items that could possibly be limited, or no access, in a SHTF situation.
It is always a good idea to have some cash on hand, for emergencies. Why NOT target saving back some coins, if you do?

If someone decides to steal from you, they are going to snatch that $100 bill in a second flat. They may think twice about trying to sneak away dragging 200 rolls of copper Lincoln cents!

It's good to be prepared. Right now, this prep is being offered at Face Value...no cost.

People laughed at dime and quarter hoarders in 1965 for saving coins. The teller at the local bank was convinced that my Grandfather had lost his mind, buying rolls of dimes after selling a vacant property Lol!

Why not save some coins away, while you also prepare in other ways?