I've not watched the DVIDA NC2 video, but I really like the DVIDA ballroom and Latin syllabus DVDs. Dance Vision usually has small sample videos available on their Web site.
You could check Dancelovers videos on Amazon - they look like they're copied off old tapes, but I doubt the steps have changed and they're half the price of the DVIDA videos. I have a DL samba DVD and it's ok for $25. And you could look for a video by Joe Baker - not super slick, but also much less than DVIDA.