Add support for video information of an extended media entity

[abjerner]

For an extended media that is a Twitter video, information about that video is provided in the JSON.

Here is an example of such an entity (see tweet):

{
  "id": 655135486290190336,
  "id_str": "655135486290190336",
  "indices": [
    79,
    101
  ],
  "media_url": "http://pbs.twimg.com/ext_tw_video_thumb/655135486290190336/pu/img/hHLh66w9FaS68YFW.jpg",
  "media_url_https": "https://pbs.twimg.com/ext_tw_video_thumb/655135486290190336/pu/img/hHLh66w9FaS68YFW.jpg",
  "url": "http://t.co/ehuTMgaBc6",
  "display_url": "pic.twitter.com/ehuTMgaBc6",
  "expanded_url": "http://twitter.com/EA/status/655135503906304000/video/1",
  "type": "video",
  "sizes": {
    "thumb": {
      "w": 150,
      "h": 150,
      "resize": "crop"
    },
    "medium": {
      "w": 600,
      "h": 338,
      "resize": "fit"
    },
    "small": {
      "w": 340,
      "h": 191,
      "resize": "fit"
    },
    "large": {
      "w": 1024,
      "h": 576,
      "resize": "fit"
    }
  },
  "video_info": {
    "aspect_ratio": [
      16,
      9
    ],
    "duration_millis": 6000,
    "variants": [
      {
        "content_type": "application/dash+xml",
        "url": "https://video.twimg.com/ext_tw_video/655135486290190336/pu/pl/vRPv3nIY-f7OkpbI.mpd"
      },
      {
        "bitrate": 832000,
        "content_type": "video/webm",
        "url": "https://video.twimg.com/ext_tw_video/655135486290190336/pu/vid/640x360/6iC_TY0KtZp34u6g.webm"
      },
      {
        "content_type": "application/x-mpegURL",
        "url": "https://video.twimg.com/ext_tw_video/655135486290190336/pu/pl/vRPv3nIY-f7OkpbI.m3u8"
      },
      {
        "bitrate": 320000,
        "content_type": "video/mp4",
        "url": "https://video.twimg.com/ext_tw_video/655135486290190336/pu/vid/320x180/MI3d_0UidfGUYcLa.mp4"
      },
      {
        "bitrate": 832000,
        "content_type": "video/mp4",
        "url": "https://video.twimg.com/ext_tw_video/655135486290190336/pu/vid/640x360/6iC_TY0KtZp34u6g.mp4"
      },
      {
        "bitrate": 2176000,
        "content_type": "video/mp4",
        "url": "https://video.twimg.com/ext_tw_video/655135486290190336/pu/vid/1280x720/UZAAUpdK56pYP7J7.mp4"
      }
    ]
  }
}

[abjerner]

Implemented and will be part of the next release ;)