then we can script to extract the xml file get the ted videos, like:
wget -c -O "1984/Nicholas Negroponte in 1984 makes 5 predictions.mp4" http://www.ted.com/talks/download/video/4837/talk/230 wget -c -O "1990/Frank Gehry as a young rebel.mp4" http://www.ted.com/talks/download/video/4047/talk/231 wget -c -O "1998/Aimee Mullins on running.mp4" http://www.ted.com/talks/download/video/5996/talk/443
...
wget -c -O "2011/Wadah Khanfar - A historic moment in the Arab world.mp4" http://www.ted.com/talks/download/video/11071/talk/1084 wget -c -O "2011/Wael Ghonim - Inside the Egyptian revolution.mp4" http://www.ted.com/talks/download/video/11086/talk/1086