Can you output video from STS Nav system?

[Acropolis]

I am thinking of putting in a pair of headrest video screens in an STS. Will the in dash Nav system output video to an auxillary source? If so, will it still operate when in motion?

Are there other options for playing video (DVDs)? I want something that is easy to access, yet is hidden/looks stock.

Thanks,
Acropolis

[Acropolis]

While searching old posts, I noticed that someone mentioned that a dealer can activate the rear screen out capability on the Escalade navigation system. Is this capability present on the STS Nav, or is it a different unit?

Thanks,
Acropolis