Rip from JW Player 6.11.4923

Rip from JW Player 6.11.4923

 

Hi all,

I've should rip some videos from a site that requires login. The video format is JW Player version 6.11,4923. I've tried with Download Helper extension for both Firefox and Chrome, but that could't make it. Iv'e also tried ant.com plugin for firefox, without help.

So can anybody please help me how do i download/rip videos from a JW player?

Thank you!