So far, the group has written, produced, edited and starred in 10 videos based on “The Hunger Games” trilogy, each about eight minutes long and posted on YouTube under the name L4gMast3Rz. The teenagers posted their first video in December 2010, more than a year before Hollywood’s first film came out. That episode was quickly picked up by “The Hunger Games” fan site Mockingjay.net and in less than a week was viewed 6,000 times.