Re:It gets worse. (Score 1)

I think the original article used 'similar files' only as a rough example. How I imagine it would work would be similar blocks could be downloaded from many sources. So in the example of a movie with German language, as long as the video blocks were the same, they would be interchangeable between the 2 files. This actually would not be hard to do, if there was a standard for block sizes, each one should have a different md5 hash, so what a client would do is say "do you have md5 hash xxxxxx block, please send it to me". This way it would not matter where in the file the other block was, but the original (torrent file in this case) file would have the info on where the md5 hash would go.