Correct me if I'm wrong, but I'm pretty sure the only way you can share this video is to share your iTunes password with other people, have them log into iTunes under your account, use one of your (what I think is) five re-downloads Apple grants you, and download it to their computer.
So... whoever is uploading it, despite the generosity, is taking a risky chance of letting five complete strangers go onto his account.
Unless there is a way to hack this security, the free TWS video train won't be leaving the station until the DVD is in shops.