If you want to see the movie through edonkey you need to have the beginning of the file, then right click and preview. If not, right click on the file, write down the met-file name. Then you must go to where your temporary files are stored, find the .part file that matches the met-file name.
Copy that file somewhere, rename it as movie.avi or something, then try and open it. Sometimes it works sometimes it does not. If it does not you can either try divfix, or try a hex editor (not recommended) to select the parts of the file that have information.
Hope this works for you, Rich