You find a USB cable and connect one side to your computer and the other side to the tv..Once finished, everything you do on the computer will be seen on the tv
Today almost any station has the respective website where you can watch the channel you are interested in. For example, if you want to watch ABC channel you go to http://abc.com and watch live...
I'm not sure what is iptv, but it looks like it is some paid service. I usually watch TV online using a program called "Free online tv" or something like that. It is free and I'm pretty sure that...