cool.

Main reasons are basically what you mentioned: Can't have stuff leaked (many times I have to sign NDAs) and working onsite means the team works together and sharing large video files is faster on a local network. Many of the source materials are large images and video files.

thats pretty good.  So what's the motivation for MTV, etc to have you on site?  to give feedback faster or because they don't want their stuff getting leaked in advance?

I'm freelancing, but that requires a bit of explaining. For about 3/4 of my work, I'm contracted through a production company or creative studio and I work onsite in their offices. NBC Sports, HBO and MTV are examples of those types of projects. For the remainder of my work, I am contracted directly with the client and in those cases, I'm kind of a one-man show playing art director, producer and animator. The New York Times, ITVS and Youtube are examples of those.

nice work...

thats a really impressive client list for your first 6 months!  are you freelancing or working at an agency?