Suggestions for live video analysis?

I'd like to add a camera set-up to do live video analysis indoors in my hitting bay.

I have a newish laptop with a good graphics card, and I plan to add a USB 3.0 camera.

Just not sure about the camera specifics or which software to use. I don't want to buy $500+ professional software for coaches, that would just be overkill. But I'm not sure what other options are out there.

I'd love to hear from someone who's actually done this.

I realise that this is late but thought I would mention anyways,
I have the zepp golf. It works ok, but the real nice part now is that you can set up your cell phone using the zepp app to take videos. You set it up on front facing or from behind and it will automatically start and stop the video. It works quite well for this.