Watch The Movie While The Download Is In Progress In Firefox

you can see the movie when the download is in progress instead of waiting to
complete the download the trick is: 
Download a movie, note that the movie which is not in rar
format or compressed in zip. except this u can watch even the movie splitted with hj split
just download a movie/song /videosong in firefox and open downloads there u can see the downloading movie. Right click on it and u can see a option that open containing folder open folder and u can see the downloading file and beside that u can see the part file open the part file with vlc media player and u can watch it. Note that download latest version of vlc media player and open the part file when it is downloaded 1% above.