BP-Gallery - Video Size

add_filter('bp_get_gallery_media_sizes','change_media_size',10,2);
function change_media_size($settings,$media_type){
if($media_type=="video"){
$settings['thumb']=array('height'=>240,'width'=>312);
$settings['mid']=array('height'=>240,'width'=>312);
$settings['larger']=array('height'=>505,'width'=>640);
}
return $settings;
}