After watching the video we tried this with a few pieces of Silver. An Omega Bracelet, a hammered pair of Silver Earrings and a Silver Chain. The Omega Bracelet was awful, like BLACK. So was the chain. And the Earrings were all blotchy. It is actually hard to see how tarnished all these were.
After we did this (twice by the way) the pictures below are the result. The Omega and the earrings were PERFECT. The chain not so much however it was about 70% better and we could do this process with that one a few more time to fully bring it back to new-like condition.
Here are some before and during pics...
So there is the before and after.
Try this technique rather than toss your "old" Silver.