prueba a guardarlo asi
$object = '<object width="426" height="350" type="application/x-shockwave-flash" data="http://www.youtube.com/v/l1hF-VS1bGs&feature=related"><param name="movie" value="http://www.youtube.com/v/l1hF-VS1bGs&feature=related" /></object> ';
y en el insert el valor es $object
$sql = "INSERT INTO tabla (objeto) VALUES ($object);";