A Look Back is an experience that compiles your highlights since joining Facebook. Depending on how long you’ve been on Facebook and how much you’ve shared, you’ll see a movie, a collection of photos or a thank you card.
Take a look at: facebook.com/lookback
Click Edit above your movie. Use the checkmarks on your photos and other stories to adjust whether they appear in your movie.
After you're done editing, click Update or Share Your Movie above the video player to save your changes and share the edited movie.
When you share your movie, use the dropdown audience selector to chose who you share it with. People who are in the audience you chose (ex: friends, public) will be able to see your movie.
Keep in mind that if your movie includes things you only shared with a few people, the people you share your movie with will now be able to see everything you included in your movie.
You can edit your movie to adjust what’s included, and select the audience you share it with. If you change your mind about who you would like to share your movie with, you can change the audience from your activity log.