Hi,
I'm looking for a way to "inject" some events into a flash movie running on a browser. I know about ActionScript's ExternalInterface.addCallback function, however I'm trying to achieve this with any "random" flash from the web. Eg. send a "SPACE" keyboard event to a youtube video.
Unless Flash is configured to listen for the events you're trying to send it, my guess is that what you want to do isn't possible. But, as my wife will surely tell you, I'm wrong a lot.
I'm pretty sure that this isn't possible, unless the developer of the .swf actually includes ExternalInterface to get your input =P
In other words, I don't think you can do this, though I might be wrong.
You can't do this to any random swf on any website because of security limitations. You need to have access to the DOM, which can only be done by Javascript Injections, unless you are the one with the swf embedded in the site, with allowScriptAccess="always" in the html template. MySpace, for example, allows you to add any random swf to the html page, but you can't do that javascript stuff because they force allowScriptAccess to always be false (among other things) to prevent any javascript/dom access.
If this is just for you to make your own life easier while browsing, you can use Firebug for Firefox. Check out this JQuerify Bookmarklet and Video, Hacking Digg with Firebug and JQuery. It shows you how to dynamically modify the webpage your on using javascript, and save those commands as shortcuts! Super cool.
So you could save a JQuerify command like:
$("#youtube_player").play();
...or whatever the api is for starting a youtube video in their html page, if that's even possible.
Hope that helps, Lance