To edit your video's title or description:
On the Instagram app
Tap

or your profile picture in the bottom right to go to your profile.
- Tap
below your bio or story highlights. - Tap the video you want to edit.
- Tap
(iPhone) or
(Android) and then select Edit. - Once you've made edits to the title or description, tap Done (iPhone) or
(Android).
Note that you won't be able to edit your cover image once you upload a video.