No way. MP4 is a compressed output file, you cannot extract any assets from it as would have been possible partially if you had published to HTML5. Did you check if there is no backup file available? In 11.5 Backups are made automatically. Or you can try to find the cache folder, zip it and you'll have another backup.
If you really only have the MP4, you can only use it to create an interactive video, but that will be probably not what you want.