WordPress filters', 'accessible-video-player' ), 'http://codex.wordpress.org/Function_Reference/add_filter' ); ?>

add_filter( 'avl_add_custom_fields', 'your_function_add_formats' );
/** 
* Filter to insert or remove video formats.
* @return array Array of all post meta fields shown with video library post type.
*
**/
function your_function_add_formats( $fields ) {
	$fields['mov'] = array( 'label'=>'Video (.mov)', 'input'=>'upload', 'format'=>'mov','type'=>'video' );	
	return $fields;
}

add_filter( 'avl_add_custom_fields', 'your_function_add_languages' );
function your_function_add_formats( $fields ) {
	$fields['de_DE'] = array( 'label'=>'German Subtitles (SRT/DFXP)', 'input'=>'upload', 'format'=>'srt','type'=>'subtitle' );	
	return $fields;
}