Protecting YouTube v3 API key in a client-side application

Question

I\'m looking at the following guide: https://developers.google.com/youtube/v3/getting-started

The first step of interacting with YouTube\'s API is:

Answer 1

This was due to a quota cost increase, it's temporarily reverted. We'll announce cost changes in http://apiblog.youtube.com/ and https://developers.google.com/youtube/v3/revision_history going forward.