This is definitely a "your mileage may vary" solution. The "magic of twisted pair" mentioned doesn't really work as simply as implied here - and even then, it's being used inconsistently (R, G, and B are "twisted" with a ground wire, the synchs are not).
The page itself mentions that it works OK for 50 feet but even then doesn't give clean blacks.
If you are happy with low resolution, it's a cheap thing to try and see what happens. If it doesn't work for you, you're only out a few bucks.