(sorry don't have time to run through the OP script and check what you're getting for outputs, but...) - I'm not even entirely sure how these images would stit

(sorry don't have time to run through the OP script and check what you're getting for outputs, but...) - I'm not even entirely sure how these images would stitch together - between 1.jpeg and the rest, there is very little overlap. RANSAC likely won't find matchable points. - you're asking for a pretty severe homography of the scene.