How to change your iPhone video’s aspect ratio for TikTok

Just follow the instructions using your iPhone to change your video’s aspect ratio to 9:16 (the aspect ratio used for TikTok app)
You’ll need to do this if you are uploading a video to your TikTok account or any other platform if you are uploading a pre-existing video. This will ensure your video is uploaded in the correct width:height ratio, so they can look their best.