question: public void copyVideoData ( Video v , OutputStream out ) throws IOException { Path source = getVideoPath ( v ) ; if ( ! Files . exists ( source ) ) { throw new FileNotFoundException ( "Unable to find the referenced video file for videoId:" + v . getId ( ) ) ; } Files . copy ( source , out ) ; }
target:  This method copies the binary data for the given video to the provided output stream. The caller is responsible for ensuring that the specified Video has binary data associated with it. If not, this method will throw a FileNotFoundException.