Json 如何使用 Elasticsearch 搜索嵌套对象

好的，到目前为止我还没能弄明白这件事.希望有人能提供一些见解.

Given the documents below, how would I search for all documents with a video that has "test" in the video title? I'm using the HTTP API. (Basically, how do you search nested objects with elastic search? I know there has to be docs out there, but I haven't really been able to find any.)

[{
    id:4635,
    description:"This is a test description",
    author:"John",
    author_id:51421,
    video: {
        title:"This is a test title for a video",
        description:"This is my video description",
        url:"/url_of_video"
    }
},
{
    id:4636,
    description:"This is a test description 2",
    author:"John",
    author_id:51421,
    video: {
        title:"This is an example title for a video",
        description:"This is my video description2",
        url:"/url_of_video2"
    }
},
{
    id:4637,
    description:"This is a test description3",
    author:"John",
    author_id:51421,
    video: {
        title:"This is a test title for a video3",
        description:"This is my video description3",
        url:"/url_of_video3"
    }
}]