In the sharing options, look for the QR Code button.
Here is your complete guide to mastering the "barcode" method for Instagram videos. 1. What is an "IG Barcode" for Videos?
You can often change the color of the code to make it look more appealing.
You don't need third-party apps to create these; Instagram has a built-in feature for it. Find the Reel or Video you want to share.