Force download long video url strings

I own a simple php script which download videos from facebook my problem is i use a file [login to view URL] to force download videos but it uses the base64 for facebook long video url which take a bit time and uses huge source from server and also create a big [login to view URL] file my needs is 1- force download long video url without using base64 directly from facebook source video url =========================> example for video url [login to view URL] =================> 2- make the file works fine to not gave any error 3- make the [login to view URL] can't be access direct without url 4- make the file not uses any extra sources from the server to be like if some one do Save As for the video 5- make the download file appear the video downloaded size thanks