How to record with an iPhone 6 whilst being able to see the display on a computer?

I want to record videos for YouTube on my iPhone 6 since it has a great camera. My question is, is it possible to record on my iPhone whilst being able to see what is being recorded, on a secondary display for example my computer (or iPad). My computer is a Windows 8 PC by the way.

I used to use an app called Duplicam that you installed on both the iPhone and iPad. It let you see and control the iPhone camera from the iPad. Don't know if it's still around.

See this page for possible other solutions:
http://appcrawlr.com/app/related/422038