I've BT infinity broadband. My HDR1000 is connected to router via ethernet/powerline networking.
I can't seem to use -
*iplayer
*itvplayer
*4oD
*Channel 5 thingy
But YouTube and Curzon Home Cinema are fine. I've also got a NowTV! box and it's happy with the above.
What generally seems to happen is that the players will show the programs available but selecting one, the waiting indicator appears and nothing ever happens. Whilst I can use the NowTV! box, it's not ideal (it's connected via wifi, don't like what it does to the picture, etc).
Looking at previous posts, other people seem to have experienced similar but slightly different problems. Tried some of the solutions suggested but, sigh, haven't helped.