How to save video file in user's default photo library on Android

I create a video file via my android app program, and I would like to give user the ability to save this file in the default photo library on Android, but I could not find a way to locate the default photo library. I found these variables,

media.PhotoLibrary
media.SavedPhotosAlbum

Not sure what is the difference between the two? And whether they can be used to locate the photo library path on Android? Thanks.
[import]uid: 90 topic_id: 21516 reply_id: 321516[/import]