I use this method to promote music, but the principle should be the same. It should be an easy way to gain alot of targetted traffic through facebook videos. First, make an account for the product or niche you want to promote. I suggest making a new account for each product or niche. Next, search for people who are related to your niche and generally have alot of friends, the more friends, the better. Once you have alot of friends who are in some way related to your niche, upload a video. This is the step that give you traffic. Tag ALL the friends that you added in the video. This way, on their feed, it will say they have been tagged in a video, and also, all of their friends will recieve a feed post telling them that their friend has been tagged in a video, and will be able to see the video. Imagine if you have 500 friends, each one of these 500 friends have 500 friends, that is 250,000 people, who in theory, could see the video. This is very basic, and there are alot of ways to twist this.