I tried in openwebif iptv streams seem to have trouble playing from small screen on top left hand corner but if you go to current on openwebif and scroll down you will get relevant info.
I did actually say to play the stream on your box and then check openwebif, ;)
Are you saying you have tried this with xtream tv plugin or just talking general iptv with one of my plugins.
And you are able to get the relevant info from xtream tv to get a provider url and possibly username and password