it takes a long time to edit together a whole dvd. not only that, but burn them, print them, and then ship them to all customers.
so far, its takes me usually about 2 or 3 days to put together a 4 minute edit. i dont even do an hour long. an hour long would take easily 3 weeks. on top of that, they have to get non-licensed music otherwise if they used any song, they could get sued. they have to after that, burn every dvd which in that takes a long time. maybe 20 minutes ish depending on computer per dvd. then they have to ship on top of all of that which would take about a week depending on where you are from.
im not trying to sound like a douche, but think about the steps next time. theres a lot more to do than it looks like.
Let's see what happens...