Yeah, I'd love to hear fan produced audio descriptions! Unfortunately, what you're doing would be against the law. You'd be distributing a modified version of the audio track to a movie, and the movie studio owns the copyright to that audio. There are no exemptions for audio description; I'm a member of several...shady websites...that specialize in distributing audio described movies, and I can think of at least three of them that were shut down over the last few years. That's despite the fact that they only distribute described audio, and don't include the picture at all. The only one that seems to have any staying power is
$1, probably because they don't offer downloads.