Send data in fragments with nginx!

Hello,

   We're using video streaming site with nginx and most of the users

download videos via IDM(Internet Download Manager). We want to prevent
this
downloading by sending videos into fragments so IDM will not be able to
download full video instead it’ll cut the video into fragments of KBs
and
that way user will not be able to play video after downloading it in
fragments just like dailymotion does.

We’ve also checked connections per ip module of nginx but that is not
suitable for our environment.

Is there any module nginx support to fulfill our requirements?

Pardon me for bad english.

Regards
Shahzaib