Auto-embed youtube videos, in much the same way as images are already done.

public/ytembed.js

@@ -0,0 +1,22 @@
+// let's fetch us some goddamn API
+var apiEmbed = document.createElement('script');
+apiEmbed.src = 'http://www.youtube.com/player_api';
+document.getElementsByTagName('script')[0].parentNode.insertBefore(apiEmbed, document.getElementsByTagName('script')[0]);
+
+// this will be called by the player API when it's finished downloading
+function onYouTubePlayerAPIReady() {
+    var youTubePlaceholders = document.getElementsByClassName('ytplaceholder');
+    for(var i = 0; i < youTubePlaceholders.length; i++) {
+        var videoURL = youTubePlaceholders[i].innerText;
+        var videoIDMaybe = videoURL.match(/[?&]v=([A-Za-z0-9\-_]+)(?:[?&]|$)/);
+        youTubePlaceholders[i].innerText = '';
+        if(videoIDMaybe) {
+            var ytVideoID = videoIDMaybe[1];
+            var player = new YT.Player(youTubePlaceholders[i], {
+                height: '290',
+                width: '480',
+                videoId: ytVideoID
+            });
+        }
+    }
+}

views/quotes.jade

@@ -1,11 +1,19 @@
 ul#quotelist
+    -var hasYouTubeVids=false
     -each quote in quotes
         -if(quote.match(locals.url_regex))
             li.quote 
-                a(href=quote)
                 -if(quote.match(/(jpg|png|gif|jpeg|tiff)$/))
+                    a(href=quote)
                         img(src=quote)
+                -else if(quote.match(/youtube.com\/watch/))
+                    -hasYouTubeVids = true
+                    span(class='ytplaceholder')
+                        =quote
                 -else
+                    a(href=quote)
                         =quote
         -else
             li.quote #{quote}
+    -if(hasYouTubeVids)
+        script(src='/ytembed.js')