My first thought after watching this presentation was to send it to my more liberal friends. My second thought was that they would not have the patience to sit through the talk without closing their minds or mashing the stop button.
A single 45 minute talk is going to be way too long to work on a liberal. Better is to try to ask questions, although cornering liberals won't do any good. Since their liberal beliefs are axiomatic, anything in the real world which would seem to contradict their belief must have some other explanation, even if it hasn't been discovered yet.