Gary Miller from Citizen Lab has made a career Exposing Cyber Threats and Digital Surveillance. 

He specializes in mobile network threat intelligence and surveillance monitoring. He has testified to Congress, the Department of Justice, as well as been a contributor with the Washington Post and the Intercept. 

Chapters:
0:00 Concerning Discoveries While Working in Telecom 
4:57 Why Your Cellphone is so Vulnerable 
10:18 The Concerning Observation of Huawei 
14:00 NSO Group Tries to Buy Access to Cellular Network 
18:58 Detecting Pegasus Spyware 
24:06 Internet Censorship & Surveillance in Iran 
31:37 Internet Behavioral Profiling 
33:55 Internet Shutdowns? 
36:06 Western Internet Vendors Called out! 
40:50 How to Protect Yourself