If you disable Amethyst's built-in compression, basically choosing the highest quality when uploading media, some problems tend to go away.
Discussion
nostr:npub1qnykqjt67cv2ux84z3anuhpsnmea3f39za52rsyzpcpvjdmgesasvkcxvz that could solve your problem. Maybe you have some compression running on Snapchat that nostr doesn’t like too
That's what Vitor said.... Lately I just go to Primal and upload there...lol