Using testing account youtube video for test

Changing youtbe video to test account video for avoiding any
permission issues and unavailability of video.

BUG=chromium:726575
TEST=manual

Change-Id: Ic6286eba5d5fd613ef051bf6287c606d3a5ebcac
Reviewed-on: https://chromium-review.googlesource.com/541855
Commit-Ready: Avinash Kodipelli <avkodipelli@chromium.org>
Tested-by: Avinash Kodipelli <avkodipelli@chromium.org>
Reviewed-by: Vinayak Suley <vsuley@chromium.org>
diff --git a/client/site_tests/video_YouTubeHTML5/youtube5.html b/client/site_tests/video_YouTubeHTML5/youtube5.html
old mode 100755
new mode 100644
index bc4bf7e..57906df
--- a/client/site_tests/video_YouTubeHTML5/youtube5.html
+++ b/client/site_tests/video_YouTubeHTML5/youtube5.html
@@ -1,7 +1,7 @@
 <html>
   <body>
     <iframe id="player" type="text/html" width="640" height="390"
-      src="http://www.youtube.com/embed/Rykmwn0SMWU?enablejsapi=1&html5=1"
+      src="http://www.youtube.com/embed/55HFORAkYdo?enablejsapi=1&html5=1"
         frameborder="0"></iframe>
     <br>
     Player status: <span id='playerStatus'>Unstarted</span>