TPG default settings make you install VLC and the VLC plugin, you must then watch IPTV using their web page.
Personally I don’t like it.
I prefer to use VLC instead.
Open VLC, go into the File menu and select “Open Network” or “Open Network Stream”.
Check HTTP and enter the URL
http://avenard.org/iptv/playlist-tpg-vlc.m3u
Windows:
Mac:
On Linux you can directly type:
# vlc http://avenard.org/iptv/playlist-tpg-vlc.m3u