Install ffmpeg and whisper as per the instructions at: https://github.com/openai/whisper
Install gradio via pip pip install gradio
Run run.py
If you are running this on a machine on your network and chrome wont let you use the microphone because it isn't https, take a look at https://medium.com/@Carmichaelize/enabling-the-microphone-camera-in-chrome-for-local-unsecure-origins-9c90c3149339. Don't do this for sites you don't control though.
That's it.