when was it established?
1997
Netflix
 Netflix was founded in 1997 by Reed Hastings and Marc Randolph in Scotts Valley, California. 
what does hang the dj refer to? It is the fourth episode of the fourth series of the British anthology series "Black Mirror". which channel aired it? Netflix
wiki:5261178
Netflix [SEP] Introduction
Netflix, Inc. is an American technology and media services provider and production company headquartered in Los Gatos, California. Netflix was founded in 1997 by Reed Hastings and Marc Randolph in Scotts Valley, California. The company's primary business is its subscription-based streaming service which offers online streaming of a library of films and television series, including those produced in-house. As of April 2020, Netflix had over 193 million paid subscriptions worldwide, including 73 million in the United States. It is available worldwide except in the following: mainland China (due to local restrictions), Syria, North Korea, and Crimea (due to U.S. sanctions).