Filter Out Result From Nested Array - MongoDB

Question

I am trying to join & filter two collections.

Basically, I want to filter video content type from one collection & join the second collection data based upon element id.

collection_one

{
    "elements": [{
        "elementId": "ade28336-c34d-4357-a4c4-279820802a5db",
        "type": "Unit",
        "title": "TEST Unit",
        "elements": [{
            "elementId": "kajsdl28336-c34d-27492-a4c4-279820802a5db",
            "type": "Unit",
            "title": "TEST Unit",
            "elements": [{
                "elementId": "s87d9-c34d-27492-a4c4-279820802a5db",
                "type": "Unit",
                "title": "TEST Unit",
                "elements": [{
                    "elementId": "a87sdf980-c34d-s897d-a4c4-279820802a5db",
                    "type": "video",
                    "title": "TEST Unit"
                }]
            },{
                "elementId": "9cvb0fv-c34d-s897d-a4c4-279820802a5db",
                "type": "video",
                "title": "TEST Unit",
                "elements": []
            },{
                "elementId": "a7sd9s-c34d-s897d-a4c4-279820802a5db",
                "type": "video",
                "title": "TEST Unit",
                "elements": []
            }]
        }]
    }]
}

Collection_two

{
    "elementId": "a87sdf980-c34d-s897d-a4c4-279820802a5db",
    "created_date": "2022-03-21T10:10:57.836Z",
    "updated_date": "2022-03-21T10:10:57.836Z"
}

The expected result would be like this

{
    "elementId": "a87sdf980-c34d-s897d-a4c4-279820802a5db",
    "type": "video",
    "title": "Test Unit",
    "elementsMeta": {
        "elementId": "a87sdf980-c34d-s897d-a4c4-279820802a5db",
        "created_date": "2022-03-21T10:10:57.836Z",
        "updated_date": "2022-03-21T10:10:57.836Z"
    }
}

I tried with lookup its returning data with parents also & I don't want the parents in the result.

{
    from: 'collection_two',
    localField: 'collection_one.elementId',
    foreignField: 'elementId',
    let: {type:'video'},
    pipeline: [],
    as: 'content_metadata'
}

The result I am getting

{
    "elementId": "ade28336-c34d-4357-a4c4-279820802a5db",
    "type": "Unit",
    "title": "TEST Unit",
    "elements": [{
        "elementId": "kajsdl28336-c34d-27492-a4c4-279820802a5db",
        "type": "Unit",
        "title": "TEST Unit",
        "elements": [{
            "elementId": "s87d9-c34d-27492-a4c4-279820802a5db",
            "type": "Unit",
            "title": "TEST Unit",
            "elements": [{
                "elementId": "a87sdf980-c34d-s897d-a4c4-279820802a5db",
                "type": "video",
                "title": "TEST Unit"
            }]
        }]
    }]
}