replace the default no-video onscreen name with an image

I host most of the Zoom or Teams meetings I attend, and often it's more convenient to not be on-camera.

So, if I choose to NOT enable video when on a call, the default (perhaps only?) option for otherwise identifying oneself on-screen is the Zoom-created black 16:9 box with the username in white. Can I insert an image instead...a .png, .pdf or .jpg instead...one with a headshot and the name against a custom background? This would be an image of the correct pixel count (and what would that be?). Don't laugh...attached here is what I'm thinking.

Thanks!