the embed always looks like this:
<div class="twitter"><blockquote class="twitter-tweet" data-lang="de"><p lang="en" dir="ltr">Breaking: Trump recorded having extremely lewd conversation about women in 2005 <a href="https://t.co/myzyMRB47i">https://t.co/myzyMRB47i</a></p>— Washington Post (@washingtonpost) <a href="https://twitter.com/washingtonpost/status/784484823717011456">7. Oktober 2016</a></blockquote></div>
and we use the default script https://platform.twitter.com/widgets.js and have no dynamic content. the embed-code is in the page when we inject the script.