I'll email for passwords on occasion, but to me it feels a little like entering into a contract to say something about what I find there, since the person has to go to the trouble of responding to my request (that's not an issue with an automatic response, obviously). Given that I only like a small percentage of the online vids I've seen, I'm often not willing to wrestle with my self-imposed sense of obligation to find something nice to say that goes along with asking for a password. I hate to think of the person on the other end thinking how impolite I am for specifically asking them to do something and then not offering any comment in return.