The third FAQ on Plan B's website is "How does Plan B work?" Here is the response they give.
Stop. Read that last sentence again.
That last sentence there is key. Stopping implantation (which the video says it does not do) the makers says it can do. Folks, that's an abortion because it's preventing the fertilized egg (conceived human) from attaching to the uterus where it would continue to receive adequate nutrition that is necessary for life.
What does the FDA say?
Under question #4 "How does Plan B work?" they say essentially the same thing as the manufactures. The only difference is that they add that if implantation has already happened, Plan B will not end that pregnancy. That's great, but it still could end a pregnancy by stopping implantation if its hasn't yet occurred.
"Plan B works like a birth control pill to prevent pregnancy mainly by stopping the release of an egg from the ovary. It is possible that Plan B may also work by preventing fertilization of an egg (the uniting of sperm with the egg) or by preventing attachment (implantation) to the uterus (womb), which usually occurs beginning 7 days after release of an egg from the ovary. Plan B will not do anything to a fertilized egg already attached to the uterus. The pregnancy will continue."
I will say that I do find it interesting that the video claims that since Plan B does not prevent implantation, Plan B is not abortive. IF it was true that implantation could not be stopped after conception, then I would agree with them. What the video is admitting by that statement is that life begins at conception.