The tool used in the video can be found here: https://miniextensions.com/airtable-r...
Remove backgrounds of images in bulk. This extension uses Remove.bg to remove backgrounds of images in bulk from attachments on Airtable. You just need to name the field where the images are stored. It will remove their background and import them to a new field. You can also set it up to automatically process any new records going forward. All processed images will be saved as PNGs.