Thank you for describing how this works
Unfortunately, I still don't understand how this works, nor what the target result is.
"they are forced into registering their approval of the videos using Facebook's “Like” button."
And? Apart from maybe being "forced" to give some sort of approval for a viral marketing video what harm has been done? Do Facebook users by their very nature even know or care that they have done this? After all, these are the same folk who think that they have 600 friends just because other people clicked on "Friend" at some distant time.
Or am I missing something?