Fix for WP 4.0

git-svn-id: https://plugins.svn.wordpress.org/youtube-metabox/trunk@1041792 b8457f37-d9ea-0310-8a92-e5e31aec5664
Edit video height

git-svn-id: https://plugins.svn.wordpress.org/youtube-metabox/trunk@1041795 b8457f37-d9ea-0310-8a92-e5e31aec5664