function do_add_stream(&$mvTitle, &$stream)
{
    $MV_SpecialAddStream = new MV_SpecialCRUDStream('add');
    $MV_SpecialAddStream->stream_name = $mvTitle->getStreamName();
    $MV_SpecialAddStream->stream_type = 'metavid_file';
    $MV_SpecialAddStream->stream_desc = mv_semantic_stream_desc($mvTitle, $stream);
    // add the stream:
    $MV_SpecialAddStream->add_stream();
}
function doSpecialEditStream()
{
    $MV_SpecialAddStream = new MV_SpecialCRUDStream('edit');
    $MV_SpecialAddStream->execute();
}