What happened inside Sewol ferry

It contains two video clips taken by two boys from Danwon high school and both of them died from the accident. We release this English-subtitled version in order for you to understand why we are devastated. It has been more than three months but nothing has been done. We do not know 1. Why the disaster happened and 2. NONE has been rescued was done for the first three days of the disaster and nothing has been revealed until now. SHARING this will help us.