Facebook isn’t done trying to capture snapchat generation. First it was the instagram stories and now it’s the video-oriented separate app called Lifestage. Lifestage does pretty much everything Snapchat does, but it’s been created for high schoolers. The reason we say that is because the app can only be used by users 21 and younger. While lifestage can be downloaded by people of any age, anyone over 22 will only…