Why do all objects fall at the same rate ?

This video describes the concept of freely falling objects. It explains that why all the objects fall at the same rate in the vacuum. All the objects falling freely under gravity takes same time to travel a fixed distance. To keep the value of acceleration due to gravity constant, force changes according to mass.
Objects with higher mass have higher inertia and takes more force to accelerate at the same rate. Two objects of different masses released from the same height fall at the same rate.
I have used a short video clip of experiment performed by BBC studios in NASA's largest vacuum chamber so that viewers can understand the concept of 'same rate of acceleration'.
Why do all objects fall at the same rate in hindi.

Видео Why do all objects fall at the same rate ? канала ESSENTIAL INFINITY