WPreso Video FeatureBox and WPreso Video Flow have been updated to version 0.2.

The dependency on the deprecated function mime_content_type() has been removed.

The function would check the mime type of the files in the plugin CSS directory and would then include the files which where CSS files.

Due to the fact that the function has been deprecated and some servers do not support the function, this validation has been removed. It now only checks the extension.

FileInfo might be used in the future, but as far as I have read, support for this could also be limited, so the best option is to wait until PHP 6 that should bring new built in support for file mime types.