Most of the time you are going to have to do it manually becuase torrents come compressed.
So what you are going to have to do is make a shared directory and make a downloadable directory.
One you are done uncompressing the torrent file, you just have to move the .avi or .mov however the video file is in into that directory.
on that folder you want shared... just make it access to "everybody" they are just videos right, nothing really secretive about them. right click, sharing >>> advance sharing.