It doesn't matter where you get it when you blow up a small moving image file and it gets distorted into a blur it is not an accurate image. I also don't believe you.
Brian, why not just post the video link or upload it to youtube if you do not want to make your IG public.
I know it can be disheartening to see your relaxed belly that bloated. I would deny and avoid posting the link myself.
here are a few similar examples not shopped