Here are some interesting videos on Windows 10 privacy concerns.

Why Privacy in Windows 10 is an Issue

https://www.youtube.com/watch?v=goy0jBquW10

Windows 10 - How-to Regain Your Privacy

https://www.youtube.com/watch?v=rczgCmoNSSE

Remove Windows 10 Spyware from Windows 7/8/8.1

https://www.youtube.com/watch?v=sY79D0K7938

How to disable Telemetry / Data Collection in Windows 7 / 8 / 8.1

https://www.youtube.com/watch?v=MRoXFSvKivw