This is fantastic! I am definitely going to try this out. My employer sells enterprise software that, in its current iteration, is horrifically complex from a UX standpoint and we're forced to take a gazillion number of screenshots for training materials. This seems like it will definitely save time.
There are plenty of screencasting tools out there ie screentoaster.com that do an awesome job.
Our differentiator is in the printable user guide and making tutorials interactive vs watching a mouse move on the screen.
But you are exactly right about the use case, enterprise UX is very complex with tons of different types of "transactions", and copy/pasting screenshots is so painful, thats why everybody avoids it like the plague.