Alternative Christmas Message on 4 on Demand. Watch Alternative Christmas Message online when you want on 4oD. Whistleblower Edward Snowden, who revealed the mass surveillance programmes organised by the US and other governments, gives this year's The Alternative Christmas Message.

Six months ago, Snowden, a computer analyst turned whistleblower, brought to global attention top-secret National Security Agency (NSA) documents leading to revelations about widespread United States surveillance on phone and internet communications.

Snowden lays out his vision for why privacy matters and why he believes mass indiscriminate surveillance by governments of their people is wrong.