As to the title, I programmed it to replace the button that's the mirror on the remote of the 15 second skip-back. That happens to be the [LIVE] button on the remote, which brings back the "live" TV channel instead of what's being watched. Since we never used it for that, it was an obvious choice. And since the skip-forward adds so much to our quality of life, it also fit that way.
As to why I shout, "Live! LIVE!" (pronounced as a commend, not a description) when I do it … well, who knows?
How to Enable a Hidden Commercial-Skipping Button on Any DVR
Depending on where you get your DVR, it may or may not have the ability to skip commercials. The best ones have a button that lets you jump forward, but if your DVR was issued by a cable or satellite company, they may have hidden or removed it. Here are some semi-secret ways to do it anyway.