I'd like to watch videos from my laptop on my tv

You will also need a 3.5 MM jack to RCA for your sound as well as a short stereo RCA cable. SVideo only transmits video, you need to send sound to your TV as well. Radio Shack sells these. They can also be used to send audio from an MP3 player to your TV or from your computer to an external home theatre system for greater sound quality. Do not confuse this with a 3.5mm to A/V RCA cable. That was designed to allow ipods to send A/V to a TV and you will be paying for more inputs then you need. The headphone jack of your laptop will usually send Left and right audio (mine has 2, the first sends front Left and Right, and the 2nd sends rear left and right, center and subwoofer. Most people only use front left and right so all the others are bundled into the second).

PS. The 3.5mm to RCA is usually sold with Female RCA endings so you will need a male RCA cable to connect to the RCA ports on your TV. I have a 20' RCA cable running from my Mac to my Amplifier to play my itunes on my Theatre speakers, but if you don't need that much a 3-6' RCA should work fine and would be a lot cheaper. On the mac side, I have the 3.5mm to Stereo RCA adapter hooked to my Audio out jack on the back. This is the cheapest option vs getting a PCMCIA TV tuner card which can set you back at least $80-$100, if not more. Tell the people at RadioShack what you are trying to do and they should be able to find the exact products I am talking about. The adapter should be about $5-10 and the cable should run you another 5 or so bucks as well.