Trick 1. Post Instagram Video on a Browser. Login into your Instagram on Chrome. Press F12 to open the developer tool. Go to the upper of the window and select iPhone XR. Browse the web version of Instagram and hit the plus icon to upload from the computer.
Trick 2. Post Instagram on Facebook Creator Studio. Link your Instagram and Facebook accounts on Chrome. Go to Facebook Creator Studio, hit Create Post, and select Instagram feed. Enter the title and description for the Instagram video. Hit +Add Content, select From file upload, choose the video for upload, and then hit Publish.