Youtube搜索返回过去的直播活动

Question

我正在使用新的API网址来检索所有当前的实时内容，但几乎每天API都会返回过去的实时事件（不再是这样），就好像它在那个时候一样。

"snippet": {
"publishedAt": "2015-06-10T10:56:50.000Z",
"channelId": "UC6ozjPR4vgS0lGmj4FLC5QA",
"title": "Climatempo News AO VIVO -  Edição das 12h30",
"description": "Confira as últimas informações sobre as condições do tempo no Brasil e PARTICIPE!",
"thumbnails": {
"default": {
"url": "https://i.ytimg.com/vi/15QJYDg9YsI/default.jpg"
},
"medium": {
"url": "https://i.ytimg.com/vi/15QJYDg9YsI/mqdefault.jpg"
},
"high": {
"url": "https://i.ytimg.com/vi/15QJYDg9YsI/hqdefault.jpg"
}
},
"channelTitle": "climatempo",
"liveBroadcastContent": "live"
}

此视频于2015/06/10现场直播，但今日（2015/06/16）以“直播”方式返回。

我正在使用此网址： https://www.googleapis.com/youtube/v3/search?part=snippet&channelId=xxx&eventType=live&type=video&key=xxx