Defrag of big video file

[StanH]

Windows XP Pro.

File dn008.0318.mp4 had been downloaded from democracynow.com by Miro.exe.

 

451,294 KB, about 6,264 fragments.

 

Windows defrag couldn't defrag it (or severals other video files.) Piniform defraggler showed 3 fragments after defragging it, but the message window said:

 

"defrag complete, no files were defraggmented."

 

Analysis confirmed file as having 3 fragments. The file played correctly in Quicktime media player and other players.

 

Please help me understand:

 

Q1 - How can a file become so fragmented?

 

Q2 - Why can windows not defrag it but Piniform Defraggler can defrag it?

 

Q3 - Why does Defraggler say that no files were defraggmented?

 

Information will be appreciated,

Stan Hilliard