Repair video on ‘Wrapping a REST API…’ blog post

The http URL was not loadable. Changed it to https.

Author: steveluscher

site/blog/20160502-rest-api-graphql-wrapper.md

@@ -198,7 +198,7 @@ However, as we mentioned before, this architecture features some inherent perfor
 Take the next 10 minutes to watch me build a server side version of the GraphQL wrapper above using Node and Express.
 
 <iframe id="ytplayer" type="text/html" width="640" height="390"
-  src="http://github.com/%3Cspan%20class="pl-corl">http://www.youtube.com/embed/UBGzsb2UkeY?autoplay=0&origin=http://graphql.org&start=900"
+  src="http://github.com/%3Cspan%20class="pl-corl">https://www.youtube.com/embed/UBGzsb2UkeY?autoplay=0&origin=http://graphql.org&start=900"
   frameborder="0"></iframe>
 
 ## Bonus round: A truly Relay compliant schema