I use my lappy to watch downloaded video on my TV all the time. My computer is a Hewlett Packard and the output is a single pronged yellow socket. That plugs straight into a yellow socket on the front of my telly, which is a Sony. As for the audio, I take it from the headphone socket and that goes straight into the white and red audio inputs on the tv too. You can get scart connectors, which take the two audio jacks and the single tv jack and allows you to plug them into a scart socket, but I've found it's fiddly and takes too much time. S-Video, I found, was a total nightmare and I never actually got it to work...