Facebook – Is it possible to edit the Facebook lookback video

When you actually post on facebook, you can only upload one photo or video.

What your friends have done is uploaded a bunch of photos in an album, and after the upload was successful, facebook asked them to post about the photos that just uploaded - only in this post there can be more than one photo, not in your ordinary post.

Play through the video once and you should see the "Share Your Movie" button right on top of the video. If you don't see it, refresh the page and it should pop up.

This had happened to me as well. Let me know if it doesn't work for you.