How to get Quicktime Player to record audio from my Mac computer when using a Logitech H600 headset?

I have a YouTube account that I just started a bit ago, and when I would record, I used Quicktime Player. I was able to get it to pick up my voice, and my Minecraft game sounds were loud enough that it would pick them up also. But today, I got a Logitech H600 wireless headset. It recorded my voice great, but right when I was about to do a new video, I discovered that it didn't pick up my game sounds considering it was a headset, not my built in mic on my Mac desktop. But, the headset was 60 bucks and worked very well so I didn't want to return it. So, I'm asking, is there a way to get my built-in screen recording software, Quicktime Player, to take in the sounds my Mac makes, and also the sounds from my headset. Please help me.

Youtube Channel: www.youtube.com/PenguinPancakesGames

Record your screen first, edit your video, and then add narration last.

If you don't care about your sound quality. Then pull out the headphones and record from your Mac mic.

If you want better quality and do it all at once you will need an application such as ISHowU HD.

Your Mac only has one input option available at a time. However, software can record both.