Video capture question

since people here make a lot of game vids i thought this would be a good place to aask. I was thinking of recording some vids of my online matches for maybe reflection and seeing if i can spot some of my mistakes to improve on(well not only for fighting games i like to record some of my wow pvp matches too). For an xbox using an HDMI out what do you think would be a good and cheap option to record video feedback?

This is a tech talk question. Read the stickies there.