My Recent Youtube Page Plugin HELP

I am having a problem with one of my plugins for my site. I tried to modify the embed scource output in the my-recent-youtube-widget/MyRecentYT.php plugin as i am trying to get my pages valid XHTML. It was working fine before i messed about with it, but now it is displaying this error code where the embeded video used to be

Warning: file_get_contents() [function.file-get-contents]: URL file-access is disabled in the server configuration in /homepages/10/d252155856/htdocs/wp-content/plugins/my-recent-youtube-widget/MyRecentYT.php on line 251

Warning: file_get_contents(https://gdata.youtube.com/feeds/api/users/ArtsOfLife/uploads?v=2&orderby=published&max-results=1) [function.file-get-contents]: failed to open stream: no suitable wrapper could be found in /homepages/10/d252155856/htdocs/wp-content/plugins/my-recent-youtube-widget/MyRecentYT.php on line 251

I Deactivated the plugin, deleted it, downloaded it again as i thought that would do the trick to get be back to square one, but even when i install the original version of the plugin, i am still getting this error.

My website is

Can somebody help me with this please.