Yes, I pinky promise. No, but seriously, it's not malware. Feel free to decompile it, throw it in VirusTotal or anything else to satisfy your paranoia.
Setup is easy: correlate the feeling with your state. Leave the IP as 127.0.0.1 unless you have a weird setup. Make sure the websocket server is active in Veado and input the correct port (it changes every time).
Make sure OBS websocket server is enabled and doesn't require authentication. Once setup, start the plugin. It’ll ask you which scene corresponds to which emotion. You can either create scenes with the default names or specify others. Click start, wait a bit, and it’ll kick in. I recommend testing it on angry or sad to see how it switches back to neutral.