Wordpress Share in FB to unlock video plugin

Hello, I'm new in this forum and my English isn't very good, but I will try to explain you what I'm searching for. I'm searching for a plugin for wordpress, called "Share to unlock video". I saw this plugin in a lot of websites, but I didn't find it free, only paid. Can you help me with the searching? Thanks

Here you go, I personally don't trust in MafiaShare because they use some holes in the code (as backlinks and others) but it's working! http://www.mafiashare.net/download/codecanyon-viral-lock-like-google-1-or-tweet-to-unlock/

want you lock or like??? best is share locker