Video Abstract
Capture Video Abstracts in an <abstract> element with an
            @abstract-type attribute of value video
.
The <abstract> element must include a child
                <title> element with the content Video Abstract
.
The 
        <abstract> element must also include a child
                <fig> element with the following attributes:- 
                    @fig-typeattribute with the valuevideo 
- 
                    @idattribute containing a unique identifier for the figure
- @positionwith the value- float 
The fig element must include the following child elements:
        - <label>with the content- Video Abstract 
- <long-desc>containing a- @content-typeattribute with the value- transcript and a- @xlink:hrefattribute containing the file-name of the transcription text file.
- <media>containing a- @content-typeattribute with the value- video/mp4 , an id attribute containing a unique identifier for the media and a- @xlink:hrefattribute containing the file-name of the video file.
Example
<abstract abstract-type="video">
  <title>Video Abstract</title>
  <p>
    <fig fig-type="video" id="bk978-0-7503-3775-5va" position="float">
      <label>Video Abstract</label>
      <long-desc content-type="transcript" xlink:href="bk978-0-7503-3775-5va-transcript.txt"/>
      <media content-type="video/mp4" id="bk978-0-7503-3775-5va-video" xlink:href="bk978-0-7503-3775-5va-video.mp4" xlink:type="simple"/>
    </fig>
  </p>
</abstract>