Chances are very slim, depends on which airlock you have. In the video you saw the guy had a one way check valve designed specifically to not let any air no matter what. If you have the 3 piece airlock it will just suck the liquid from the airlock into the beer (unless you get some sort of miracle clog) The best thing to use is the one piece S shaped airlocks, if filled properly they work in both directions, so as your beer cools it's able to suck air in without sucking the liquid out of the airlock. You will also tend to get less suction if your carboy is filled as much as possible, like an inch or two from the bung.