Post Animated Covers On FB

How to Post Animated Cover on Facebook:-

Step 1: Finding Timeline of any person on facebook which is containing animated pictures. If you don't find any, you may use my profile.
 I have my cover picture as an animated one. you can tag my animated cover in order to make it as your animated Cover.

Step 2: Tag yourself on their cover photo.

Step 3: Go to Change your cover picture. Choose your cover picture from picture from photos. Select the animated picture in which you tagged yourself in second step!.
Another way...

Go to Change Cover
Choose from photos
View Albums
Photos of you
Now select the picture in which you got tagged.
You’re done! Your cover picture will be an animating one now.