The video showed the bleeding man lying on the ground and being kicked and assaulted by two others.
However, the assaulted also hit back at his two assailants with a dagger and injured them, police said.
All the three - Sudeep, Hanumantha and Sunil - who were injured are in the age group of 20-25.
The trouble broke out over a girl. Sunil and Dhanush, both students of a private college in Hassan had differences over the latter's relations with a girl, according to the police. .
They picked up an argument as they came face to face at a bus stand.
Sudeep and Hanumantha assaulted Sunil even as many other students and passengers stayed mute spectators, as also the policemen.
The Hassan Extension police reached the spot and shifted the injured to the hospital.
