Adds the ability to play youtube videos.

It still needs a bit of work, but playing and pausing are operational.

add-on/youtube.js

@@ -0,0 +1,76 @@
+console.debug("Loading youtube.js")
+var video;
+
+function onload()
+{
+    video = document.getElementsByClassName('video-stream html5-main-video')[0]
+}
+
+function getState()
+{
+    if (!video)
+    {
+        return 4;
+    }
+    else if (video.ended)
+    {
+        return 3;
+    }
+    else if (video.paused)
+    {
+        return 1;
+    }
+    else
+    {
+        return 0;
+    }
+}
+
+function getTime()
+{
+    return video.currentTime;
+}
+
+function getLength()
+{
+    return video.duration;
+}
+
+function play()
+{
+    if (video != null)
+    {
+        video.play();
+        return true;
+    }
+    return false;
+}
+
+function pause()
+{
+    if (video != null)
+    {
+        video.pause();
+        return true;
+    }
+    return false;
+}
+
+function seek(time)
+{
+    if (video != null)
+    {
+        video.currentTime = time;
+        return true;
+    }
+    return false;
+}
+
+if (document.readyState === "complete")
+{
+    onload();
+}
+else
+{
+    window.addEventListener("load", onload);
+}