[Useless]

I just tested it and works smoothly.

Vbulletin put two line breaks in when Howling pasted the code into the code thing. Note that the extension part is case sensitive.
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<?php
$path = ".";
$extensions = array( "mp4" );

$files = array_diff(scandir($path), array('.', '..'));

foreach ( $files as $file ) {
if ( ! is_file ( $file ) ) continue;
$file_parts = pathinfo( $file );
if ( ! in_array( $file_parts['extension'], $extensions ) ) continue;

if ( ! file_exists( $file_parts['filename'] ) && ! mkdir( $file_parts['filename'] ) ) { echo "Oops! Could not create directory {$file_parts['filename']}\n"; continue; }

$new_loc = $file_parts['filename'] . "/" . $file;
if ( ! file_exists( $new_loc ) && ! rename( $file, $new_loc ) ) { echo "Oops! Could not move {$file} to {$new_loc}\n"; continue; }

echo $file . " moved to {$new_loc} successfully.\n";
}
?>
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