Stay with Flash when RTMP is blocked

Just remove the RTMP playlist item instead and then reload the playlist. Not sure why I didn't do it this way the first time.

This works in IE8 where HTML5 video isn't supported.

To test, open `Site/SiteAmazonCdnMediaManifestPage.php` and make the port something crazy that will be blocked. Make sure to also check your cookies as you may have to delete the `[…]_html5` and `[…]_rtmp_status` cookies.