Enter bbc into the playlist box and voila.
Just enter bbc into the search box.
It's the official site of all european broadcasters.
You have access to all the live streams (without commentary) from all the arenas and all the live streams from all european stations.
Just enter bbc, zdf, ard, etc... in the search box to get the corresponding live stream with their commentary.
It also works if you are blocked on the broadcasters website (e.g. i can't watch the zdf live stream, but can watch it here).
They have live streams for each olympics and for some special events.
Enter bbc into the playlist box and voila.