Everything is edited digitally (except for a few very rare instances) wether it's film or video. I know these high end editing houses and studios use networked servers, but I can't understand why they would have these tied to an outside connection. In any case I have a feeling they're going to start locking down these editing systems to eliminate any possibility of this happening.
A lot of these companies are starting to play around with rendering in the cloud. Back in the older days, places like Pixar would have a giant data center in their office for rendering. If you render in the cloud, you have to pay strict attention to security. Smaller companies don't have the resources or knowledge to do this well.
I would think it would be fairly easy to have all this stuff done on networks with no outside connection. At least now with the threat of losing millions of dollars it seems pretty sensible, assuming this isn't what they are already doing.
