Just had a look at this video... I have the same problems now and then.
Most likely I see it with fast moving abstract flash files (like your example)...(ie... Rebel overlay-Microtech footage pack).
Adjusting NVidia settings won't work. And I get the same tearing in Res 2.41 too with these files... Probably the abstract footage is more likely to show this because of high contrast and straight geometry ?!
I always blamed the cables !?!, but I'm curious if there's another solution towards this issue....
The refresh rate/fps of the output seems ok (40-60 FPS) but I see the problem also on the preview monitor inside Avenue... As said by goto10.... could the flash source be the problem? Is it possible to convert these footage to AS3 flash?
desktop: Windows 7 home premium 64 bit, MSI 870A-G54, AMD Phenom II X4 955 Black Edition, 4Gb RAM (GVP34GB1600C9DC), NVidia GTX 560
laptop: Windows 7 home premium 32 bit, Core2duo 2Ghz, 4Gb Ram, NVidia 9600m GT