Chu Chu loved it. “She wanted me to repeat it again and again,” Chandar recalls. Which gave him an idea: “If she is going to like it, the kids around the world should like it.” He created a YouTube channel and uploaded the video. In a few weeks, it had 300,000 views. He made and uploaded another video, based on “Twinkle, Twinkle, Little Star,” and it took off. After posting just two videos, he had 5,000 subscribers to his channel. Someone from YouTube reached out and, as Chandar remembers it, said, “You guys are doing some magic with your content.” So Chandar and several of his friends formed a company in Chennai, in the South Indian state of Tamil Nadu, from the bones of an IT business they’d run. They hired a few animators and started putting out a video a month.
Estimates for YouTube's annual revenue, nearly all of which still comes from ads, vary a fair amount. But many of the estimates are now above $10 billion. At different points, Bank of America and Mizuho forecast that YouTube would post 2017 revenue of $13 billion and $12 billion, respectively. And in February, Baird's Colin Sebastian estimated YouTube is doing around $15 billion in annual sales.
YouTube carried out early experiments with live streaming, including a concert by U2 in 2009, and a question-and-answer session with US President Barack Obama in February 2010. These tests had relied on technology from 3rd-party partners, but in September 2010, YouTube began testing its own live streaming infrastructure. In April 2011, YouTube announced the rollout of YouTube Live, with a portal page at the URL "www.youtube.com/live". The creation of live streams was initially limited to select partners. It was used for real-time broadcasting of events such as the 2012 Olympics in London. In October 2012, more than 8 million people watched Felix Baumgartner's jump from the edge of space as a live stream on YouTube.
YouTube earns advertising revenue from Google AdSense, a program which targets ads according to site content and audience. The vast majority of its videos are free to view, but there are exceptions, including subscription-based premium channels, film rentals, as well as YouTube Premium, a subscription service offering ad-free access to the website and access to exclusive content made in partnership with existing users.