According to Wikipedia, "the Illuminati (plural of Latin illuminatus, "enlightened") is a name given to several groups, both real (historical) and fictitious. Historically the name refers to the Bavarian Illuminati, an Enlightenment-era secret society founded on May 1, 1776. In more modern contexts the name refers to a purported conspiratorial organization which is alleged to mastermind events and control world affairs through governments and corporations to establish a New World Order. In this context the Illuminati are usually represented as a modern version or continuation of the Bavarian Illuminati."
These two videos are supposedly "leaded" in January 2012 and represent new "recruiting videos" to encourage people to join this shadow group.