Help with videos please?

Hey everyone, I'm interested in starting a channel.. I'm really new though to making vids.

How do I add stuff to the video other then what I have recorded? For example, if I'm making a Money making video and I want to show the calculations on a different page, how do I add that into the video? :s

Thanks!
Wub

 

If you know what you want I can make it for ya.


Usually people just write in notepad, protip: do it before you film or you look like a huge noob.