YouTube API retrieve URL of unlisted or private livestream?

Question

I want to use the YouTube API to check for a current livestream and get it's URL. The livestream is UNLISTED.

I can successfully get information on my PUBLIC livestream from my channel using this:

https://www.googleapis.com/youtube/v3/search?part=snippet&channelId=MyChannelId&type=video&eventType=live&key=MyApiKey

However it does not return any results when the livestream is UNLISTED.

What am I missing here?

EDIT:

I am using PHP if that matters.

It appears that this is probably what I am trying to implement: https://developers.google.com/api-client-library/php/auth/service-accounts

And perhaps I will need to use liveStream or liveBroadcast? https://developers.google.com/youtube/v3/live/getting-started

Answer 1

This is the intended feature for any UNLISTED videos/streams. They cannot be accessed like regular vids. UNLISTED vids can only be accessed through:

anyone who knows the video's unique video ID can retrieve the video metadata.

as mentioned in Youtube properties.

Also Jeff Posnick of Youtube answered in this google forum:

The public videos feed doesn't contain any information about private or unlisted videos, so they won't be returned in the results.