But if you CAN copy it, you should :). Nothing wrong with copying strats from other players, just don't expect to execute with such finesse as well.
It seems like a really good idea actually. Nydus worms are very underused and I would like to see Zerg players use them a lot more often. Nydus worms allow your army to be at multiple places at multiple times and really makes it easier for your units to move around the map, especially in big maps like Shakuras. Imagine it like the warp gate for protoss. All you need is one nydus worm, because off of 1 nydus worm, you can make 10.
Of course its easier said than done, and specifically in Lost Temple, I almost always open with mutalisks, just to take away the threat of Terran drops on my cliff. If I go against a Protoss I don't really worry about cliffs as the most dangerous ranged unit that Protoss has is a colossus, in my opinion.