From the youtube description:
Opening with a train journey, the film shows views from the train as it passes through a village and crosses a bridge. The camera is next on a boat, showing rapids, the jungle, locals on a raft and members of the expedition fording the stream.
This is followed by scenes of the local industries. Locals quarry for manganese ore, gather rubber from a tree (watched by Europeans) and pick and sort tobacco leaves from the fields. Further scenes reveal locals at a trading post and performing for the camera.
Next, Chinese convicts collect their food, before a sequence showing a European supervising two locals as they chop a sago palm tree. Once felled, the trunk is sawed off and buffaloes (ridden by locals) haul the logs off screen.
Local boys take part in a swimming race - diving off a gangway, watched by a European figure rowing alongside - before the film concludes with further shots of the buffaloes, driven into, and crossing, the water.