A modeling attempt on this video needs to change the frame rate to 30frame/s instead of the default 20 f/s
[img]http://2.bp.blogspot.com/-hujI8RP1Cjk/TZXt54eVs1I/AAAAAAAAAls/044OpKH_g0o/s640/tracker01.png[/img]
http://weelookang.blogspot.com/2011/03/tracker-scaling-in-yishun-junior.html

no sure this video belongs to who and where.

should be Douglas Brown's