Instagram introduced the story in 08/2016. It offers the possibility to take your followers with you on spontaneous video or photo post, in everyday life, at an event or on the road. Despite all these great possibilities, video creator still face a difficult task.
If you want to use an Instagram Story with all its possibilities, you have to use the video format 9:16 (the conventionally used format is 16:9). Currently, only professional editing programs (e.g. Final Cut Pro from Apple or Premiere Pro from Adobe) offer the possibility to set this format individually. Furthermore, if you want to record videos with a professional camera, you have to turn the camera 90° to use the portrait format.
Therefore, before shooting, you have to decide where you want to play the video and in which format you want to record it.