Jenn Herman wrote:

Here are some quick highlights about reels:

  • They’re short-form video content in full 9:16 portrait mode.
  • They can be from 3–15 seconds in length.
  • They can be filmed directly within the Reels camera and/or uploaded from your camera roll on your mobile device.
  • They can be filmed as one full take or a series of takes stitched together.
  • They’re mobile-only. They can only be uploaded on mobile devices.