You can create a Facebook profile video on Cinemagraph Pro for iOS or Cinemagraph Pro for macOS.
Cinemagraph Pro for iOS
When you've completed your cinemagraph tap Done and then Export. Select Facebook Profile Video which will open up as a new profile video on Facebook. Tap Use and you're done. It's that easy!
Cinemagraph Pro for macOS
When you've completed your cinemagraph click Export and choose H.264 (MP4). The maximum length for a profile video on Facebook is 7 seconds. That said, the number of repetitions should equal less than 7 seconds. If it does exceed 7 seconds you can adjust the trim on Facebook.
You can currently only upload a profile video from iPhone or Android. Transfer the video to your device via AirDrop, Dropbox or another file transfer service. Go to your profile and tap on your profile picture or video. Tap Select Profile Video. Select your video and tap Next after you've made the appropriate adjustments to your trim and crop. Tap Save or Use to update your profile video.