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>
    <allfileusages gafcontinue="Box-multilaser-isdb.jpg|4327" />
  </query-continue>
  <query>
    <pages>
      <page pageid="779" ns="0" title="Bandwidth" />
      <page pageid="1944" ns="0" title="DVB-S2" />
      <page pageid="3493" ns="0" title="Leadtek WinFast TV2000 XP Expert" />
      <page pageid="3685" ns="0" title="Saa7162 devices" />
      <page pageid="3885" ns="1" title="Talk:Hauppauge WinTV-HVR-850" />
      <page pageid="4328" ns="0" title="Leadership ISDB-T" />
      <page pageid="4332" ns="0" title="AOC ConnecTV Digital" />
    </pages>
  </query>
</api>