Hall of Famer Achievement
Hall of Famer0
Watch 50 hours worth of video
You can simply let the app run and allow it to cycle through the videos on the left hand side of the screen. You will unlock the hours worth of content achievements as they correspond with the number of hours the app runs through videos.
One word of caution though--the app has a tendency to crash a bit, so if you plan on doing other things while the app runs, be sure to check in on it every so often.