Here you will find demonstrations on studio portrait lighting. Don't forget that everything done in a studio can be done outside with natural light.

1-Light Portraiture: Tony Corbell & Profoto D1

2-Light Portraiture: Tony Corbell & Profoto D1

3-Light Portraiture: Tony Corbell & Profoto D1

4-Light Portraiture: Tony Corbell & Profoto D1

Thanks to Mamiya for these videos.
You may visit their site by clicking here.