Problem with downloading flash video

I have tried to install and use several add-on (Firefox) to download a flash video from
None of them works. They only work on popular sites (e.g. YouTube).

Can anyone help me and explain how to download this videos? (For those who are concerned about copyrights - my country allows downloading)

I haven’t done this in a long time so I may make mistakes.
I think that site uses rtmp regular grabbers won’t work, install rtpmdump and read-up on it’s use

sudo zypper in rtmpdump
streamcapture might be very helpful
no official rpm but there is a deb package (try alien) and source available of you’d like to play with make.