Interesting perspective on Digital advertisement. During CY2016, US Digital advertisement spend has exceeded TV Adv. However, there are certain issue about Youtube and the major customer. Find enclosed economist article on the subject.
Find enclosed Zenith Forecast about global advertisement. Refer to Page 84 to 87 for India related forecast.
http://zenithmedia.se/wp-content/uploads/2016/10/Advertising-Expenditure-Forecasts-September-2016.pdf