I installed the package so that my site would look just like the demo but I get this error:

Warning: file_put_contents(/home/mevzecom/domains/mevzune.com/public_html/plugins/system/yt/includes/libs/minify/config.php) [function.file-put-contents]: failed to open stream: Permission denied in /home/mevzecom/domains/mevzune.com/public_html/libraries/joomla/filesystem/file.php on line 406

I've seen this error before on other systems. I think if you ran a regex, correcting permissions; folder at 755 and files at 644, this problem would go away.

Give it a try.

Walt.