this article/video talks about how Facebook advertising is a scam and waste of money because of click-farmers: http://www.tubefilter.com/2014/02/10/veritasium-derek-muller-fake-facebook-likes/ AT 5:27 of the video, he said the the logical solution would be to exclude countries from click farm companies. then he created an ad targeted to non-click farm countries only. so it's unclear how he ended up with all these clicks from click farms. if those people have an IP address in a click-farm country, how do they even see the ad in the first place?
It is essential to determine if a certain video is credible or not, if you have a good antivirus, this can help you determine if the site can be trusted or not.