How can I download this live stream from castalba.tv?

[noyoof]

I have a live stream from castalba.tv that I would like to download. I don't know what rtmpdump is though. Could somebody please help me? Here is the stream:

Link:
http://castalba.tv/channel/27900

Embed Code:
<script type="text/javascript"> id="27900"; ew="550"; eh="400";</script><script type="text/javascript" src="http://castalba.tv/js/embed.js"></script>


Also, could somebody show me how to watch the downloaded stream on my iPad, Roku, or Apple TV? And one the stream is downloaded will it use wifi or not?

Please help. Thank You!