Facebook made it very simple to edit the video. The editable portion is divided into four parts.
1. Your first moment where you can choose 3 of your favourite photos.
2. Your most liked posts where you can choose your favourite post.
3. Photos you uploaded where you can choose to show your fav photo that you’ve uploaded
4. Last one you can even choose to show which photos to show on the grid of your videos.
After doing everyone, You’re happy then share your videos with your friends.