I'm trying to use <embed> but having limited success. These two URLs won't embed, for example.
<embed style="width: 500px; height: 300px;" 
  src="https://www.tate.org.uk" width="300" height="150">
</embed>
<embed style="width: 500px; height: 300px;" 
  src="http://www.northlondonreadinggroup.co.uk/" width="300" height="150">
</embed>
Whereas other URLs will...
https://adsler.co.uk/adsler-blog/
I came across these: How Can I Bypass the X-Frame-Options: SAMEORIGIN HTTP Header? If I post them in my site header, can I bypass iframe restrictions?
<script 
src="https://unpkg.com/@ungap
/custom-elements-builtin"></script>
<script type="module" src="x-frame- 
bypass.js"></script>
