title: How to get python code samples on Youtube API V3 with API KEY only
body: <p>I want to get python samples on using an API KEY to interact with Google's Youtube API V3 and get the list of videos of a specific channel, I don't want to use OAuth, I want to use API KEY credentials.</p>
  
  <p>The API explorer shows both credential types but the code samples only use the OAuth method.</p>
  
  <p>I want to have a python script listing a channels published videos.</p>