Close and delete a video in QuickTime Player without being challenged to save

I often record short videos of myself in QuickTime Player, playing pieces on guitar that are only relevant to me once, and I do not save them. It's very simple to initiate a new recording, with command-option-n, and space bar to start. However, deleting this recording is far more complicated. I have to press command-w, then tab 4x and then enter.

I do not want to be challenged to save recordings; if I have pressed command-w, then I have already committed to deleting the video. I want to skip all the steps after command-w, but I can't find any settings to make it work like this.

Is there another keypress that closes a video without being challenged to save? What is it?

It goes without saying, but this must involve only the keyboard - no mouse or trackpad.