Make resources paths absolute. 
diff --git a/media-source/mediasource-addsourcebuffer.html b/media-source/mediasource-addsourcebuffer.html index 69f6c35..ce4ace5 100644 --- a/media-source/mediasource-addsourcebuffer.html +++ b/media-source/mediasource-addsourcebuffer.html 
@@ -1,11 +1,11 @@  <!DOCTYPE html>  <html>  <head> - <script src="../resources/testharness.js"></script> - <script src="../resources/testharnessreport.js"></script> + <script src="/resources/testharness.js"></script> + <script src="/resources/testharnessreport.js"></script>  <script src="mediasource-util.js"></script>   - <link rel='stylesheet' href='../resources/testharness.css'> + <link rel='stylesheet' href='/resources/testharness.css'>  </head>  <body>  <div id="log"></div>