Media Player app to play music files in the torrent directory. Possibly where it doesn't modify the torrent contents.... Winamp and such modify the files so the hash doesn't match anymore...
VLC built in...
husam kaldirim commented
its increase the file size of the utorrent
i think this idea will change its differency ( super low size )
I don't think this is feasible as you can use other applications just as easily by double clicking the file. Just open it up in Media Player Classic or VLC Player to play the media file.