SOUNDS LIKE A SETUP, BUT while the speakers are lighthearted (pun intended) their topic is both serious and joyful. Brother David Steindl-Rast of http://gratefulness.org and Rabbi Lawrence Kushner (http://www.rabbikushner.org/) talk shop: specifically, mysticism and religion, but in accessible terms. (They’re also chatting over dinner.) At just under eight minutes, this video clip is the length of a cup of tea or coffee; while such things are best learned face-to-face, intimate multimedia isn’t a bad second. And since tonight begins the festival of Chanukah, a little more light isn’t bad either.