I just cannot screen record on Mac and have the internal audio recorded at the same time.

I've searched everywhere on this website and others, I followed direct instructions with Blackhole 2ch, Quicktime Player, and Audio MIDI setup. I don't need to connect the audio to my Airpods, I just want to hear my recordings being played out without outside audio bothering the video. For some reason, it just goes silent when I play back the recording I did. Can someone please help me figure out what I'm missing? I feel like it's a small dumb issue I looked over but I can't put my finger on it, if not Blackhole, is there any other recommended free software with no watermarks?