Lots of null vod in Clips API

Well, so I guess I’m complaining that the return format changed. Here’s one clip from this morning compared to the same one this evening. Notice that “vod” is null now, whereas before it was a JSON object. It was nice to at least see the timestamp, though your explanation may apply to both cases. However I’ve also had results like the first example in this post in which the streamer probably was archiving streams, because other clips from the same streamer had a vod id and vod url.

    {
        "id": "RockyCautiousReubenRedCoat",
        "tracking_id": "62597802",
        "url": "https://clips.twitch.tv/RockyCautiousReubenRedCoat?tt_medium=clips_api&tt_content=url",
        "embed_url": "https://clips.twitch.tv/embed?clip=RockyCautiousReubenRedCoat&tt_medium=clips_api&tt_content=embed",
        "embed_html": "<iframe src='https://clips.twitch.tv/embed?clip=RockyCautiousReubenRedCoat&tt_medium=clips_api&tt_content=embed' width='640' height='360' frameborder='0' scrolling='no' allowfullscreen='true'></iframe>",
        "broadcaster": {
            "id": "146635835",
            "name": "easyy_ja",
            "display_name": "easYY_ja",
            "channel_url": "https://www.twitch.tv/easyy_ja",
            "logo": "https://static-cdn.jtvnw.net/jtv_user_pictures/easyy_ja-profile_image-b487eb251349f11e-300x300.jpeg"
        },
        "curator": {
            "id": "139329246",
            "name": "997_policja",
            "display_name": "997_policja",
            "channel_url": "https://www.twitch.tv/997_policja",
            "logo": null
        },
        "vod": {
            "id": "",
            "url": "https://www.twitch.tv/videos/?t=3h21m29s"
        },
        "game": "Minecraft",
        "language": "pl",
        "title": "eee",
        "views": 15,
        "duration": 31.999667,
        "created_at": "2017-03-29T14:36:09Z",
        "thumbnails": {
            "medium": "https://clips-media-assets.twitch.tv/24914308000-offset-12088-preview-480x272.jpg",
            "small": "https://clips-media-assets.twitch.tv/24914308000-offset-12088-preview-260x147.jpg",
            "tiny": "https://clips-media-assets.twitch.tv/24914308000-offset-12088-preview-86x45.jpg"
        }
    }

and the same this evening:

    {
        "id": "RockyCautiousReubenRedCoat",
        "tracking_id": "62597802",
        "url": "https://clips.twitch.tv/RockyCautiousReubenRedCoat?tt_medium=clips_api&tt_content=url",
        "embed_url": "https://clips.twitch.tv/embed?clip=RockyCautiousReubenRedCoat&tt_medium=clips_api&tt_content=embed",
        "embed_html": "<iframe src='https://clips.twitch.tv/embed?clip=RockyCautiousReubenRedCoat&tt_medium=clips_api&tt_content=embed' width='640' height='360' frameborder='0' scrolling='no' allowfullscreen='true'></iframe>",
        "broadcaster": {
            "id": "146635835",
            "name": "easyy_ja",
            "display_name": "easYY_ja",
            "channel_url": "https://www.twitch.tv/easyy_ja",
            "logo": "https://static-cdn.jtvnw.net/jtv_user_pictures/easyy_ja-profile_image-b487eb251349f11e-300x300.jpeg"
        },
        "curator": {
            "id": "139329246",
            "name": "997_policja",
            "display_name": "997_policja",
            "channel_url": "https://www.twitch.tv/997_policja",
            "logo": null
        },
        "vod": null,
        "game": "Minecraft",
        "language": "pl",
        "title": "eee",
        "views": 36,
        "duration": 31.999667,
        "created_at": "2017-03-29T14:36:09Z",
        "thumbnails": {
            "medium": "https://clips-media-assets.twitch.tv/24914308000-offset-12088-preview-480x272.jpg",
            "small": "https://clips-media-assets.twitch.tv/24914308000-offset-12088-preview-260x147.jpg",
            "tiny": "https://clips-media-assets.twitch.tv/24914308000-offset-12088-preview-86x45.jpg"
        }
    }