Premiere 1.5 How Do I Record Movies On Youtube And Be Able To Edit Them In Adobe Premiere Pro 1.5?

How do I record movies on youtube and be able to edit them in adobe premiere pro 1.5? - premiere 1.5

I am helping my girlfriend with an introduction to sociology. How to record a video on YouTube and be able to edit Adobe Premiere Pro 1.5. So basically, I save as an AVI file?