How to get url from video reference url

I have a url of video from photo library :-

assets-library://asset/asset.MOV?id=2EBD925F-D275-403E-A6A4-3487134D9B9D&ext=MOV

How can i get convert it to NSData I am tried following but nothing worked:

videoData = [NSData dataWithContentsOfURL:[[arrVideoUrl objectAtIndex:index] absoluteURL]];