Is there any reason to purchase both the High-Definition and Standard-Definition versions of the same clips?
You can easily create SD or multimedia format video from our HDV source clips. We can even just some transcoding very affordable solutions here: Pegasys TMPGEnc Xpress for Windows and QuickTime Pro for Apple or Windows. (Note that Pegasys can do batch processing.) If you have the HDV libraries, the only reason to purchase the SD versions would be to save the cost (in time and application purchases) of having to make them yourself.