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 galcontinue="Iframe_//www.youtube.com/embed/44LpzpKB3Og_height=&quot;360&quot;_width=&quot;640&quot;" />
  </query-continue>
  <query>
    <pages>
      <page ns="0" title="HTML" missing="" />
      <page ns="0" title="ISBN" missing="" />
      <page ns="0" title="Iframe //www.youtube.com/embed/-mf1zm-3nzE height=&quot;360&quot; width=&quot;640&quot;" missing="" />
      <page ns="0" title="Iframe //www.youtube.com/embed/-q-Xv60n4KU height=&quot;360&quot; width=&quot;640&quot;" missing="" />
      <page ns="0" title="Iframe //www.youtube.com/embed/0F9iQvkU lI height=&quot;360&quot; width=&quot;640&quot;" missing="" />
      <page ns="0" title="Iframe //www.youtube.com/embed/0arkbcbeQXU height=&quot;360&quot; width=&quot;640&quot;" missing="" />
      <page ns="0" title="Iframe //www.youtube.com/embed/1KxuTXbLiH4 height=&quot;360&quot; width=&quot;640&quot;" missing="" />
      <page ns="0" title="Iframe //www.youtube.com/embed/1h00FIsAiIk height=&quot;360&quot; width=&quot;640&quot;" missing="" />
      <page ns="0" title="Iframe //www.youtube.com/embed/1vxouKo-mQw height=&quot;360&quot; width=&quot;640&quot;" missing="" />
      <page ns="0" title="Iframe //www.youtube.com/embed/3Xiu zGGS 8 height=&quot;360&quot; width=&quot;640&quot;" missing="" />
    </pages>
  </query>
</api>