🛈 YouTube API: How to generate your Youtube API key

1. https://console.developers.google.com/apis/dashboard
   Click on 'accept/ continue'
2. https://console.developers.google.com/apis/library/youtube.googleapis.com
   Click on 'enable' (middle, centered)
   Then this page reloads slowly. (Got to wait)
3. Click 'select a project' (in the top) > 'my first project'
4. Click 'activate' (again)
5. Click 'credentials' (left)
6. Click 'create credentials > API-Key' to copy your key ('AIza_____________________________________')

⚠️ Currently (only) needed for 2 ImprovedTube features: Video's Age, Channel's Sum of Videos
Hopefully YouTube will give us unlimited quota for these simple features in future
May always be required when we will have API Search features, that take a lot of Quota.