Video or imagery from the International Space Station (ISS) often uses sequential numbering. For example, ISS029-E-31817 is a known NASA identification for a high-resolution view of Earth taken from space.
The query appears to be a highly specific file identifier or numeric code that could refer to a few different types of content depending on the context . 31817mp4
"31817" was used as a catalog number for vintage record releases, such as the 1965/1966 single "Meanwhile, Down At Joe's" by Kitty Wells or Norma Jean issued on Decca. Video or imagery from the International Space Station