The vlc plug-in has been reported to work with Macs with firefox as browser. Not sure how it is with Safari. Have a look here for some discussion around this:
http://www.avforums.com/forums/freesat/1576094-vlc-player-plug-foxsat-hdr.html
An important thing is that not only vlc must be installed on your iPad, but also the vlc plug-in for the respective browser.
Secondly fyi this is not compatible with the Foxsat-HDR web-interface user access control (unsername + password) in case you’re using it. As I understand it this is because of the way the vlc ActiveX plug-ins are coded.