The ch5-29c_289NegativeDemoGraph.avi video has been created using the Xvid codec which can be downloaded from here:
http://www.koepi.info/Xvid-1.2.2-07062009.exe

Alternatively, the video can be played with VLC player, which contains the Xvid codec, and can be found here:
http://www.videolan.org/vlc/

This video illustrates face tracking, yaw angle and eyebrow height variation for a sequence containing a negative marker (its
occurance is marked in red on the two graphs). Note the constant height and the distinct yaw angle pattern corresponding to the head shake.

The mov video files can be played using QuickTime: http://www.apple.com/quicktime/download/
The mov video files "4 JOHN BUY HOUSE w neg.mov" and "8 JOHN BUY HOUSE w y n.mov", aim to illustrate that often times, a signed sentence
with the same manual signs can have different meaning depending on the nonmanual components (first paragraph of page 3 in the submitted paper). In this case
the manual signs are JOHN BUY HOUSE and the two different meanings are "John did not buy a house" in the first case, and "Did John buy a house?"
in the second case.