I haven't so far but I understand it takes a number of factors. Like the number of views your video gets and how well you promote your video. About promoting your video you can try sharing via Facebook, Twitter or Google plus and any other social site you are actively involved in. Interesting Fact "Gangnam Style video" was estimated to have generated $2,000,000 from YouTube alone at a reported rate of $2 for every 1,000 views. Just be patient and upload more videos plus don't forget to monetize you never know when your video goes viral and earn a decent amount.
Hope this helps.