This method works on any Canadian penny and doesn't require flipping the coin over.
Since the DTube video no longer plays, here's the same upload, on YouTube:
Remember, every copper penny is worth at least 5 cents!
DRutter
how to sort copper bullion from Canadian pennies (3 easy steps)
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Not sure about the content of non-copper pennies, but a really quick way of doing the same in the UK with 1p and 2p coins is to simply use a strong magnet stuck onto the bottom of a magnetic steel tray or piece of metal. Spread out all of the coins onto the tray and everything that doesn't stick is copper.