www.channel4.com: Using Rtmpdump for downloading 4OD videos

[WhynotAndy]

Hello

I'm trying to use rtmpdump to save streams from 4OD (channel 4 UK) .
The video I'm trying is at

http://www.channel4.com/programmes/my-big-fat-gypsy-wedding/4od/player/3034485

URL snooper gives me rtmpe://ak.securestream.channel4.com/4oD/mp4:assets/CH4_08_02_16_48115001001003_001.mp4
and

http://www.channel4.com/static/programmes/asset/flash/swf/4odplayer-4.37.swf

When I use rtmpdump it gives me an error telling me to use --swfVfy
I've downloaded the 4odplayer-4.37.swf player and put it in the same folder as the rtmpdump but I don't really know what string to use for this or even if I needed to do this.

Any help on how to form the correct command for rtmpdump would be great .

Thanks