most of these samples are 10 years old and have been deprecated

[osde8info]

most of these samples have been deprecated ie need new URLs & API keys to work

for example youtube is now at

curl \
  'https://youtube.googleapis.com/youtube/v3/channels?part=snippet%2CcontentDetails%2Cstatistics&mine=true&key=[YOUR_API_KEY]' \
  --header 'Authorization: Bearer [YOUR_ACCESS_TOKEN]' \
  --header 'Accept: application/json' \
  --compressed

see https://developers.google.com/youtube/v3/code_samples/code_snippets?apix=true