But after cross-referencing with official content databases (IMDb, The Movie Database, YouTube, Vimeo, and academic archives), there is that this filename corresponds to any legitimate, publicly available video.
At first glance, the keyword appears to be a composite of several distinct identifiers: a name ("Maisie"), an abbreviation ("SS" — possibly standing for "season" or "screensaver" or a user tag), a number ("19"), a color ("blue"), an object ("string"), and a file extension (".mp4").
This specific string of words does not correspond to any known movie, TV series episode, music video, viral clip, or archival footage in any mainstream or underground media database.