You are looking at the HTML representation of the XML format.
HTML is good for debugging, but is unsuitable for application use.
Specify the format parameter to change the output format.
To see the non HTML representation of the XML format, set format=xml.
See the complete documentation, or API help for more information. 
<?xml version="1.0"?>
<api>
  <query-continue>
    <alllinks alcontinue="Iframe_//www.youtube.com/embed/44LpzpKB3Og_height=&quot;360&quot;_width=&quot;640&quot;" />
  </query-continue>
  <query>
    <alllinks>
      <l ns="0" title="HTML" />
      <l ns="0" title="ISBN" />
      <l ns="0" title="Iframe //www.youtube.com/embed/-mf1zm-3nzE height=&quot;360&quot; width=&quot;640&quot;" />
      <l ns="0" title="Iframe //www.youtube.com/embed/-q-Xv60n4KU height=&quot;360&quot; width=&quot;640&quot;" />
      <l ns="0" title="Iframe //www.youtube.com/embed/0F9iQvkU lI height=&quot;360&quot; width=&quot;640&quot;" />
      <l ns="0" title="Iframe //www.youtube.com/embed/0arkbcbeQXU height=&quot;360&quot; width=&quot;640&quot;" />
      <l ns="0" title="Iframe //www.youtube.com/embed/1KxuTXbLiH4 height=&quot;360&quot; width=&quot;640&quot;" />
      <l ns="0" title="Iframe //www.youtube.com/embed/1h00FIsAiIk height=&quot;360&quot; width=&quot;640&quot;" />
      <l ns="0" title="Iframe //www.youtube.com/embed/1vxouKo-mQw height=&quot;360&quot; width=&quot;640&quot;" />
      <l ns="0" title="Iframe //www.youtube.com/embed/3Xiu zGGS 8 height=&quot;360&quot; width=&quot;640&quot;" />
    </alllinks>
  </query>
</api>