Quicktime Screen Recordings with Headphones - no audio

Going through those instructions I'm not clear on some of the terminology when it comes to different options and pathways to choose. For example, he asks if I want "aggregate" do this, or "multi channel" do that, I

don't know what these terms really mean and which one I should choose what I want to achieve.

So if I personally *don't* want to be sitting here hearing the output of a video while it's recording, but I do want to screen record the video and audio using Quicktime - does this same solution need me to offer some way for the sound to output at all, ie the headphone (as it turned out faulty) solution provided by Apple, or are headphones not needed at all?

And either way if headphones are still needed or not, could you help me out with understanding which routes I should go down in jeffreythefrog's instructions when there are choices? I tried responding to jeffrey directly but it won't let me reply.

I'm at the point where I have modified my Audio Midi Set up as jeffrey instructed. Thanks.

Hi Jeffrey, thanks for coming in. I think I've got it. So I'm running Monteray (latest my Macbook can cope with), and I think this is it:

System Preferences/Sound: choose input as Internal Microphone, and output as BlackHole 2ch.

Select Blackhold 2ch as the Microphone in the Quicktime Options dropbox.

Have I got that right - that's all I need to do?

Thanks.

OK, although I just tried the way I described above on a screen recording before I saw your reply, and it worked! Recorded in silence and played back (once I had adjusted the output back again) perfectly.

Many thanks for the explanations.

Quick follow up question - if I have two screens and am screen recording on one screen in silence, I guess it's impossible to have a zoom call on my other screen with sound, is that right? It's not possible to direct the audio input/output per screen somehow?

Thank you - very helpful.