I read about this storyline sometime ago. It tells a touching but brief story between a father and a son through a sparrow. I suppose the message it is trying to spread is our parents treated us with lots of love and patience when we were young and needed them. So when they become old, we should reciprocate and similarly accord them our love and patience when they need us most.
We may be the child to someone today, but tomorrow we may be on the other side of the coin and be the parent to someone.
The video and link are attached below for viewing: