Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.
anyone? I know it can be done some how. I've seen people upload show clips and screen shots on the internet
 
The only way i no is to get a tv tuner, then play the recording back while recording on the mac, some boxes have an option where the video is only outputted vis rf so u can continue watching tv.
 
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.