Challenges of fighting terrorism in Xinjiang: The black hands

For years, extremists in and out of Xinjiang have turned to the internet to spread their separatist ideologies. Recruitment and propaganda videos, including some that taught how to make weapons such as explosives, were being uploaded onto the internet. To counter this threat, Xinjiang's internet safe-keepers have been actively scanning the internet for suspicious materials and activities.

Full version of the documentary: 

The War in the Shadows: Challenges of Fighting Terrorism in Xinjiang