This is what happens when an airplane take off overloaded : beyond its maximum take off weight

What happens in this video ?

This accident happened in Columbia. The Cessna 182 took off overloaded. The plane barely climbed, but had not enough speed and crashed into a building a few seconds later.
The plane was operated by an organization that helps people with medical assistance on remote places of Colombia (Patrulla Aérea Colombiana). There were 4 people on board: The pilot and chief of medical staff, another physician, a little boy recently operated, and the mother of the boy. All were killed in the accident.