I used to do a lot of video work with a Sony camcorder. I used a dual 1ghz MDD which was pretty state of the art at the time. Also had a 700mhz eMac. Occasionally a friend would come back from a trip and we'd have both the MDD and eMac rendering his videos. You had to have a bit of patience but it worked well. Since then I've acquired a dual 1.25ghz MDD overclocked to 1.33. Out of curiosity I did do a 1080 HD video with it. Took a couple of days but it did the video.