Peggy Sue Got Married(1986)
Peggy Sue faints at her high school reunion, and when she re-awakens she is in the nurse's office, in her graduating year in high school. With her post-life memories intact, Peggy Sue attempts to change her future, especially with her high school sweet-heart, to whom she is in a failing marriage. But she soon finds out that the future is what you make of it, and the past just that- the past- although she does succeed in correcting a few friendship mishaps along the way.
This TV spot was originally posted to YouTube by seanmc31076.