button to save as the video in the desktop - actionscript-3

Question

I use Adobe Flash Professional CS6 + as3 and I have a button to download or save as the video in the desktop but does not execute it? Why ? Where is the mistake?
import fl.video.FLVPlayback;
import flash.display.StageAlign;
import flash.events.Event;
import flash.display.MovieClip;
import flash.display.StageScaleMode;
import flash.media.SoundMixer;
myVideoPlayer.source = "";
addChild (myVideoPlayer);
function loadMyVideo (url:String):void
{
myVideoPlayer.source = url;
myVideoPlayer.visible = true;
}
videosaveas.addEventListener (MouseEvent.CLICK, videosaveas2);
function videosaveas2 (e:Event):void
{
file = new FileReference();
var fileReference:FileReference=new FileReference();
file.save (ByteData, "video.mp4");
}

Answer 1

I don't know if you know the difference between a Flash Player app and an AIR one but I'll put an example for an offline Flash Player app to download a file which is in the same directory as the SWF.
To load the file, I'll use an URLLoader object and then save it using a FileReference one.
Here, don't forget that FileReference.save() is allowed only after a user action (like a mouse click or keypress).
For the example, I'll use the same button for both operations (the user should press the button twice to get the saving file dialog).
var url_loader:URLLoader;
// at the first, we use the button to load the file
btn_download.addEventListener(MouseEvent.CLICK, load_the_file);
function load_the_file(e:MouseEvent): void {
url_loader = new URLLoader();
url_loader.dataFormat = URLLoaderDataFormat.BINARY;
url_loader.addEventListener(Event.COMPLETE, function(e:Event){
btn_download.removeEventListener(MouseEvent.CLICK, load_the_file);
// then we use the same button to download the file
btn_download.addEventListener(MouseEvent.CLICK, download_the_file);
})
url_loader.load(new URLRequest('file_path.ext'));
}
function download_the_file(e:MouseEvent): void {
var file_reference:FileReference = new FileReference()
file_reference.save(url_loader.data, 'default_file_name.ext');
btn_download.removeEventListener(MouseEvent.CLICK, download_the_file);
}
Here, using one button is just an example so you can, for example, show a loading message, use another way to load the file, use two buttons, ...
Then for an online app (a web app), you can use, for example, FileReference.download() :
var file_ref:FileReference = new FileReference();
file_ref.download(new URLRequest('http://www.example.com/file_path.ext'));
For AIR, you have a lot of possibilities using the File, FileStream and the FileReference classes, and you have a lot of example on the net ...
Hope that can help.