w5mith/WSAssetPickerController — pull request #7 by hinathan (2013-01-09 22:16:11+00:00)
Title: Adds video picking support

Adds methods for specifying AssetsFilter (photo/video/all) and
AssetGroupTypes. Defaults to original behavior, shows either option in the demo.

This sort of resolves your TODO around doing the filter/group logic via a delegate. I'm not yet deep enough into Objective-C to do a more elegant approach but this works for my needs.