Hi,
just try to press on HD Pay button but I don't believe that you get anything to see in HD if you don't pay before.
Only thing what you can do is to find anyone who does pay already or maybe you do if you register and then you can sniff the HD stream you get and you did pay for but I also think that they will also use protected streams (more or less) with another key parameters similar as other TV streaming sources where you got keys for your IP / login datas etc.
greetz