First functional version

README.md

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+# Obtain Authorization Token from Google
+
+That the complicated part:
+* create an OAuth2.0 application with authorization for Youtube DATA Api v3 Upload
+* create a OAuth2.0 client with Desktop client
+
+You’ll need:
+* the `client_id` from your OAuth2.0 client
+* the `client_secret` from you OAuth2.0 client
+
+Then enter in:
+
+```
+https://accounts.google.com/o/oauth2/v2/auth?client_id=XXX.apps.googleusercontent.com&redirect_uri=urn:ietf:wg:oauth:2.0:oob&scope=https://www.googleapis.com/auth/youtube.upload&response_type=code
+```
+
+And accept that your YouTube account might be modified. You’ll get a code then; enter this `curl` post:
+
+```
+curl -s \
+--request POST \
+--data "code=[THE_CODE]&client_id=XXX.apps.googleusercontent.com&client_secret=[THE_CLIENT_SECRET]&redirect_uri=urn:ietf:wg:oauth:2.0:oob&grant_type=authorization_code" \
+https://accounts.google.com/o/oauth2/token
+```
+
+You’ll get a Token. The only important part is the `refresh_token`
+
+In your `tootube.toml` config file, put the `refresh_token`.