I want to automatically upload videos to YouTube without user involvement so I've created a service account, jumped through the hoops, all was looking great, then the upload, chunk one, is attempted and my code bombs with this Google_Exception exception:
"Failed to start the resumable upload (HTTP 401: youtube.header, Unauthorized)"
I then dug and found on the YouTube API v3 error information:
https://developers.google.com/youtube/v3/docs/errors
"This error is commonly seen if you try to use the OAuth 2.0 Service Account flow. YouTube does not support Service Accounts, and if you attempt to authenticate using a Service Account, you will get this error."
Is this correct? I cannot use a service account to upload video to YouTube automatically?
(that was a waste of a couple of days hard work!)
Yes, it is correct.
The way forward is to do a manual authorisation and grab the resultant 'refresh token' and then use that for any automated uploads.
Ensure to add the refresh token to the PHP Google_Client object prior to any other action.
I am now automatically uploading to YouTube.
来源：https://stackoverflow.com/questions/27457851/allowing-google-service-account-youtube-upload-access-via-api-v3