These are the three short videos shown at the 2009 Comic-Con LOST panel which appear to depict an alternate reality, universe, or timeline.
The Oceanic Airlines ad:
Hurley’s ad for Mr. Cluck’s Chicken Shack. “Ever since I won the lottery, I’ve had nothing but good luck.”
Here’s Kate on America’s Most Wanted. A different man, not Kate’s stepfather, was killed in Kate’s explosion.
(Reposted these to have them all in one place, for easy reference.)