Why Youtube "channels" API don't return "contentOwnerDetails" data? - youtube-api

Question

I'm trying to make this call to Youtube channels API but the response is without contentOwnerDetails. What is the problem?
GET https://www.googleapis.com/youtube/v3/channels?part=id%2CcontentDetails%2CcontentOwnerDetails&mine=true&key={YOUR_API_KEY}

Answer 1

It looks like it needs onBehalfOfContentOwner parameter. My request was
GET https://www.googleapis.com/youtube/v3/channels?part=snippet%2CcontentOwnerDetails&id=CHANNEL_ID&onBehalfOfContentOwner=NETWORK_ID
And I was able to get
"contentOwnerDetails": {
"contentOwner": NETWORK_ID,
"timeLinked": "2015-07-23T15:21:25.000Z"
}

Answer 2

For your GET method URI
https://www.googleapis.com/youtube/v3/channels?part=id%2CcontentDetails%2CcontentOwnerDetails&mine=true&key={YOUR_API_KEY}
The JSON response is as follows
{
"error": {
"errors": [
{
"domain": "youtube.parameter",
"reason": "authorizationRequired",
"message": "The request uses the <code>mine</code> parameter but is not properly authorized.",
"locationType": "parameter",
"location": "mine"
}
],
"code": 401,
"message": "The request uses the <code>mine</code> parameter but is not properly authorized."
}
}
According to YouTube Data API - Errors
401 (unauthorized) - authorizationRequired - The request uses the mine
parameter but is not properly authorized.
mine parameter value has to be set to true to instruct the API to only return channels owned by the authenticated user. (boolean)
Inference: You don't have the authorization to the content from the content owner, i.e., the YouTube Channel owner has probably denied permission to your application from accessing the channels content.
It's a permission issue. Where is the channelId in the URI? should probably add it.

Answer 3

If you don't own the channel the API will not return contentOwnerDetails. Since you're using mine=true parameter, you need to be properly authorized via OAuth first before the API will return contentOwnerDetails. See https://developers.google.com/youtube/v3/guides/authentication