The digital life of an MP4 file is fragile. Several factors can render a file useless. Here are the most probable causes specific to a file like sone061mp4 :
iPhones do not natively support all MP4 codecs. If you see "Unable to play this video format," download an alternative player like VLC for Mobile or Infuse. These apps do not rely on the OS codec libraries. sone061mp4 work