Every Facebook users are becoming the victim of this rapidly spreading virus. Generally, this video comes in your Facebook inbox or in status even by tagging you too. Immediately you click that video link which you received in to your inbox or in the status you are tagged in, it is forwarded to your friend and you will not know about this.
The message receiver may think that this is the MMS of the Porn video and some may immediately click this link.
Even after this message is sent, you can use your Facebook, chat, post or comment.
If you are infected, Facebook will sent you a review message and your requested to answer the security check. If you pass, you can proceed ahead as usual