screen_url::screen_url
screen::screen
clip_url::clip_url
flv::flv
duration::duration
paysite::paysite_title

// put the site link to paysite into the 'paysite_url' custom field according to Free WordPress Tube doc
$post ['custom_fields'] ['sponsorlink'] = $post ['custom_fields'] ['join_now'] = $post ['custom_fields'] ['paysite_url'] = 'HTTP://WWW.SITE.COM/';
// "sponsor" field
$post ['custom_fields'] ['sponsor'] = 'Use this to talk about the sponsor using a small description of the program or their main site.';
// format clip's duration as mm:ss
$post ['custom_fields'] ['duration'] = date ( 'i:s', $post ['custom_fields'] ['duration'] );
// fake random time from 0:20:00 to 2:00:00
$post ['custom_fields'] ['time'] = date ( 'i:s', rand ( 1200, 72000 ) );
// generate random tags. Don't forget to replace tag1, tag2 etc with the prefered tag names. Also don't forget to enable "Create tags from category names" option on the feed settings page
$post ['categories'] [] = array_rand ( array ("tag1", "tag2", "tag3", "tag4" ) );
// create an URL of thumb from it's path and file name
$screen = $post ['custom_fields'] ['screen'];
if (is_array ( $screen )) {
	$post ['custom_fields'] ['thumb'] = $post ['custom_fields'] ['screen_url'] . $screen [rand ( 0, count ( $screen ) - 1 )];
} else {
	$post ['custom_fields'] ['thumb'] = $post ['custom_fields'] ['screen_url'] . $screen;
}
// uncomment the line below to store thumbnails on your server
// cseo_store_image ('thumb', $post ['post_title']);
// since FLV videos have no unique GUID's let's use their URL's as post GUID's  
$post ['custom_fields'] ['hostedflv'] = $post ['guid'] = $post ['custom_fields'] ['clip_url'] . $post ['custom_fields'] ['flv'];
// now let's delete all useless custom fields 
unset ( $post ['custom_fields'] ['screen_url'] );
unset ( $post ['custom_fields'] ['screen'] );
unset ( $post ['custom_fields'] ['clip_url'] );
unset ( $post ['custom_fields'] ['flv'] );