Issuu iframe default

how can I default iframe?

for example
http://issuu.com/club_manga/docs/asterix.docx?e=0/33672274
return

<div data-configid="0/33672274" style="width:525px; height:371px;" class="issuuembed"></div><script type="text/javascript" src="//e.issuu.com/embed.js" async="true"></script>

iframe not 🙁
enable iframe:
http://issuu.com/club_manga/docs/asterix.docx?e=0/33672274&iframe=true

but not the default …how could I iframe default? 😀

https://ww.wp.xz.cn/plugins/issuu-embed/