title: Find Child in iFrame?
body: <p>I am trying to achieve this:</p>
  
  <p>I am working on a script that checks a Page for iFrames(done), but than it tries to find the VIDEO Tag of HTML5 in it, store its source, than remove the iframe and replace it by a new VIDEO Tag created with the previously retrieved source, the script shall grab the Element from cross domain Sites like YouTube e.g.</p>
  
  <p>So currently I was able to find all iFrames via getElementB
  
  <p>and btw: JavaScript ONLY</p>