More or less..........
I just got my Viper in May of this year. The previous owner never drove the car if even looked like it might rain or get cold so he never installed the roof for the 6 years he owned the car. Based on the condition of the top I'm sure the original owner didn't install it very often either.
I watched that video a couple times before I tried the first time.
Since it hadn't been on the car for such a long time it was a little tight to get the screws in. Maybe it shrunk a little.
I used a small bar clamp to help stretch the top fabric to line the screw up. The fabric was like a drum. After a couple days the material relaxed a little now you can do it like video.