Though I have Vu+ Zero I'm still in same boat where HbbTV does not work with Open Black Hole. (It works fine with Black Hole). Pressing red button does nothing. Start/Stop in Opera Web Browser under Plugins doesn't change anything.
It doesn't even matter what kind of channel is used or is it local DVB-T or some DVB-S. Just a nice cup of nothing. I see HbbTV logo presented in channel OSD but nothing will show up in Open Black Hole. When doing full backup I see many HbbTV related filenames in the backup log so they are there somewhere in image presented but they do not workWich service are you refering to?
Try for example Eins Festival ( on Astra 19.2 East )