YouTube HTML5 mode is used by default. Fix typo in video alpha template.

common/lib/xmodule/xmodule/js/src/videoalpha/display/video_player.coffee

@@ -59,6 +59,7 @@ class @VideoPlayerAlpha extends SubviewAlpha
       showinfo: 0
       enablejsapi: 1
       modestbranding: 1
+      html5: 1
     if @video.start
       @playerVars.start = @video.start
       @playerVars.wmode = 'window'

lms/templates/videoalpha.html

@@ -32,7 +32,7 @@
 
 % if sources.get('main'):
 <div class="video-sources">
-  <p>Download video <a href="${source.get('main')}">here</a>.</p>
+  <p>Download video <a href="${sources.get('main')}">here</a>.</p>
 </div>
 % endif