Fix black lines on Instagram video

I've recorded a video on my phone that I've uploaded to Instagram, and there are black lines appearing on it. I'm looking for someone to help me fix this issue.

Key elements of the project include:
- Removing the black lines from the video
- Ensuring the video is formatted correctly for Instagram

Ideal Skills and Experience:
- Video editing expertise, specifically with mobile-recorded content
- Familiarity with the Instagram platform and its video formatting requirements
- Experience troubleshooting issues with video playback on mobile devices