Logging in via API for HD video access

I'm wondering if there's going to be a way to log a user into the site via the api, or a key subscribers can generate for access HD videos.  (The later is preferable for security reasons.)  I'm looking into programatically downloading and provided content over a dnla server for the 360 or PS3.

http://www.giantbomb.com/videos/protected_video_url/3210/progressive/3500/ will give you a JSON response containing the video URL, and http://www.giantbomb.com/videos/protected_video_url/3210/progressive/3500/?download=1 will redirect you directly to the video. In order to view it, you will need the Key-Pair-Id. It looks like it's set to expire after a time though, so you'll need a new one periodically, and you can only get one if you're logged in as a subscriber. So you'll also have to supply a cookie if you want to get the Key-Pair-Id. Seems a bit complicated, but hopefully you can manage.
 
Edit: Replace 3210 with the ID of the video. 3500 is the quality, so don't mess with that one.

"and you can only get one if you're logged in as a subscriber."

This request can be ignored.  The RSS feeds Jeff mentioned on the Bombcast will accomplish what I want.

" @LAR: Where do you find an RSS feed for videos, that lets you access the HD edition of the video? I'm trying to do the same as you, download .mp4 HD videos and/or access them for streaming. "