Lord Chaitanya Mahaprabhu was a saint who lived in the 15th and 16th century. He was known as a genius child and became a scholar at a young age. He was also known for his compassion and devotion to Krishna.
The video says that Lord Chaitanya Mahaprabhu started a movement of chanting Hare Krishna. He traveled extensively throughout India spreading his message of love for Krishna. He is credited with reviving Hinduism and inspiring millions of people.