uploading unity project to github, which files needed code example

Example: how to upload a unity game to github

#This video may help:
#https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=&cad=rja&uact=8&ved=2ahUKEwjKktewuZDwAhXbFLcAHZ_CCDgQwqsBMAF6BAgPEAM&url=https%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3DqpXxcvS-g3g&usg=AOvVaw0yZ_uP9odeMtcPUKgRkdGG
#It's a Brackeys video on using github with unity.