How can I view the automatically created channel's live broadcast list using YouTube API v3?

I want to check the list of live broadcasts in the LOL game section of the game category through YouTube API.I live in Korea, and the url is as follows.https://www.youtube.com/channel/UCZtmNrG53nmbq-Ww2VJrxEQ (It is maybe auto generated channels)

I ran the API from this page (https://developers.google.com/youtube/v3/docs/search/list?hl=ko).Value is part=snippet, channelId=UCZtmNrG53nmbq-Ww2VJrxEQ, eventType=live, type=video

but, I got the value as follows.

{"kind": "youtube#searchListResponse","etag": "jY03jGgN1g_xKk8RSHyjN_PoL8I","regionCode": "KR","pageInfo": {"totalResults": 0;"resultsPerPage": 0  },"items": []}

There is clearly something live broadcasting, but it passes an empty value.

I don't know what I did wrong

I think the search api doesn't support auto-generated channels.

I want collect live streams data list.