Driverless taxis are available in San Francisco since ages. There is a driverless bus service in London but only as a pilot project. It is the exact copy of the bus as shown in your video.
A three-week test is designed to get the public used to riding in autonomous buses, with an eye toward improving public transportation in the British capital.
uk.pcmag.com
Find guidance for running trials of Connected and Automated Vehicles (also known as driverless cars) in London
tfl.gov.uk
The technology for autonomous vehicles exists since last 10-12 years but most countries are reluctant to implement it due to feasibility, potential risk of an accident as insurance companies charge high premium for such vehicles and other factors. Having said that, no doubt autonomous buses is the future as autonomous vehicles such as Tesla already operating on the road.