Why is it illegal? Just because the DVD FUDscreen says so doesn't mean it is.
I wonder if there's a clause disallowing transport of the DVD to a non-Berne Convention country (or non-TRIPs or whatever).
A government is failing badly in it's duty to the populus if they allow large companies to make known false claims (or indeed unknown claims) as to the legal position of a buyer.
Sure you could sue for fraud or some-such but it strikes me this sort of situation is where government needs to use a strong hand to keep corporations in line.
If the rig is in international waters, the story might be different.