Any free, safe, and headset compatible recording software for Mac?

I have a YouTube gaming channel and I need some good and free recording software for Minecraft on my Mac. I know about QuickTime Player, but I need to use my headset, and when I do, it only picks up my voice and not the game sounds. Like I said, it needs to be free, safe, and something that doesn't have a logo on the screen. NO EXEPTIONS FROM THAT Please. But, if you knew how to make Quicktime Player work the way I need it to, that would be great too. Thanks!

Youtube Channel: www.youtube.com/PenguinPancakesGames

Try Camstia but its not free.

You may refer to this mac screen recorder review, I'm sure you will find the right program to record your mac screen. I personally prefer using ScreenFlow.