Use an existing player if present when video changes.

See original issue brandly#46
Fix adapted from brandly#48

src/angular-youtube-embed.js

@@ -186,13 +186,34 @@ angular.module('youtube-embed', ['ng'])
             }
 
             function loadPlayer () {
-                if (scope.videoId || scope.playerVars.list) {
-                    if (scope.player && typeof scope.player.destroy === 'function') {
-                        scope.player.destroy();
+                // If present, use an existing player
+                if(scope.player && scope.player.getIframe()) {
+                    var playerVars = ( playerVars ? playerVars : angular.copy(scope.playerVars) );
+                    playerVars.start = playerVars.start || scope.urlStartTime;
+                    playerVars.end = playerVars.end || scope.urlEndTime;
+
+                    // Use cueVideoById() instead of loadVideoById() so the video doesn't
+                    // start to play automatically. 
+                    if (scope.videoId) {
+                        scope.player.cueVideoById({
+                            videoId:scope.videoId,
+                            startSeconds:playerVars.start,
+                            endSeconds:playerVars.end
+                        });
                     }
-
+                    else if(scope.playerVars.list) {
+                        scope.player.cuePlaylist({
+                            playlist:scope.playerVars.list,
+                            startSeconds:playerVars.start,
+                            endSeconds:playerVars.end
+                        });
+                    }
+                }
+                // Otherwise, create a new player
+                else if(scope.videoId || scope.playerVars.list) {
                     scope.player = createPlayer();
                 }
+
             };
 
             var stopWatchingReady = scope.$watch(