Instagram also has two types of videos: regular videos that are square (1080 X 1080) and are posted on your timeline, and Instagram Stories, are vertical (1080 X 1920), and disappear in 24 hours.
At the time of this writing, Instagram does not accommodate closed captions like Facebook and YouTube. Closed captions are separate files (“.srt”) that are uploaded separately and matched to Facebook and YouTube videos.
Facebook and YouTube will do their best to auto-generate closed captions that you can edit, but Instagram does not.
Here are several examples of different styles of open captions: