LMR/ HTML/ iFrame not playing nice

Hey guys, I am trying to embed a Google Docs (Google Drive) Presentation in a LMR post. I can paste the html into the HTML pop-up window, but after hitting "update" nothing happens and my html code is missing if I reopen the HTML editor.

I can get the iFrame to work via disabling rich-text, but again, it is nowhere to be found (also, again, the html code disappears) if I save or otherwise update the post.

I will post the code below, I am not sure how this post will handle it. 

<iframe src="https://docs.google.com/presentation/d/1_4udpIP_vDveeEOo4863_4UXQZURJxoZwcpYB7N9ejU/embed?start=false&loop=false&delayms=3000" frameborder="0" width="480" height="389" allowfullscreen="true" mozallowfullscreen="true" webkitallowfullscreen="true"></iframe>

It seems from some searching

that the iFrame tag is disabled for security reasons on most sites. iFrame can be used to embed malicious hidden sites. There is a plugin that can be added, but, it requires a white list. docs.google.com on a white list would be about as secure as allowing all sites in my opinion. :stuck_out_tongue: