: Tools like the Wondershare UniConverter can capture stories in high quality (HD/4K) and convert them into over 1,000 formats, including MP4.

On Snapchat, a "long story" usually refers to a on a Public Profile, which can contain up to 100 Snaps or 5 minutes of total footage. How to Create and Manage Long Stories

: Unlike standard 24-hour stories, these stay on your profile indefinitely until you remove them.

: Snapchat supports video files in MP4 or MOV formats with H.264 video coding and AAC audio.

If you are looking to build or save a long narrative in MP4 format, here are the key features: