Video lectures during the meditation? That sounds bad... the only things that I think would be acceptable are guided meditations, where you focus on different parts of your body, or moving your energy or whatever. If they legitimately had video lectures unrelated to instruction or chanting that seemed to have an agenda, I would also have left.

Personally, I think the only thing you should hear during meditation is nothing. A guided relaxation process is fine for a half hour but after that you need to leave people to their thoughts (or lack thereof :). I wonder if you would have felt better at a more Zen-style meditation where anyone talking gets hit with a stick? That's the kind of place I would want to go.