Hinduism is the world's oldest religion. There were older ones, but they have all since faded into history. Hinduism is the third largest religion in the world. It is focused primarily in the Indian subcontinent. Hinduism is made up of 1,000s of different groups each with a different take on the system. There is no single ruler. There is no single book. Hindus follow the cycle of reincarnation that is governed by Karma.
The core beliefs outlined in the Sanskrit scriptures formed the basis of the Vedic religions — later known as Hinduism — which contributed to the development of the social and political roles of a caste system and in the importance of multiple manifestations of Brahma to promote teachings about reincarnation
Hinduism (or what we call Hinduism today) arrived with the Aryan invaders thousands of years ago.
By 900 BCE, Hinduism had taken over a large part of the Indian Subcontinent.
CLIP ONE: BUDDHA & ASHOKA
This covers India and Hinduism along with Buddhism. Just watch the first 5 minutes here.