iPod Legalities of digital video output from ipods?

[Absent]

So I saw this on a crutchfield review for a pioneer ipod cable

Response from Pioneer: "In regards to the 1/8" audio jack on the CD-IU50V cable:
For music, audio is passed to the unit via the USB digital connection.
For video, all manufacturers are required to use an analog connection for the audio portion based on the digital rights management (DRM) standards of digital video.

Ipods support bypassing the internal DACs by outputting audio as digital to an outboard DAC. Correct, right?

But they sure as hell don't support outputting video as digital. Is this why?

I've found from http://en.wikipedia.org/wiki/Digital_rights_management:

DRM and film
An early example of a DRM system was the Content Scrambling System (CSS) employed by the DVD Forum on film DVDs since ca. 1996. CSS used a simple encryption algorithm, and required device manufacturers to sign license agreements that restricted the inclusion of features, such as digital outputs that could be used to extract high-quality digital copies of the film, in their players. Thus, the only consumer hardware capable of decoding DVD films was controlled, albeit indirectly, by the DVD Forum, restricting the use of DVD media on other systems until the release of DeCSS by Jon Lech Johansen in 1999, which allowed a CSS-encrypted DVD to play properly on a computer using Linux, for which the Alliance had not arranged a licensed version of the CSS playing software.

Does anyone know more about this and what specific line of legal it's referenced by?