How to record video with iMac Mountain Lion?

The best app to record your display is clearly QuickTime Player, preinstalled with OS X. Just open this app, go to File menu (on the menu bar) > New Movie Recording.

Apart from that, there are third-party applications that have got more features as the ability to modify the recorded video with that app, without having to export it to another application. I recommend Screenflow > http://www.telestream.net/screenflow/overview.htm

Another option is to use "Photo Booth", preinstalled on OS X

This is new to me. Are you saying that I can copy YouTube videos by using QuickTime Player?

Hi

I am desperately trying to solve a problem: I want to call a person and record the call, both video and audio to later include in a Keynote presentation.

Advice so far: FaceTime can't do it. Skype? I don't have the ability to go to the people I want to record...so I need to connect in some way? and have capacity to record an "interview" and then use it later as part of an overall presentation.

I am putting together a 25th celebration for a non-profit...lots of picture and displays, but I need video/audio to retain some "attention"...

Help!!!!!!

Thanks,

Richard