WYSIWYG removes HTML button all non- tags when view source Any code that I previously inserted using the html button on the rich text wysiwyg is removed when I click into edit the html within a post. Only &lt;p> tags remain. 

I have turned off the "Clean html" and the "Purify html" in the settings for the body field (rich text field), and have tried to enter iframes (videos).  I can insert them initially, but if I go back to the edit as rich text, and then click to edit the html, any iframes, divs or tags other than &lt;p> tags are stripped out of the code. 

I cannot edit html in any posts that have videos else the videos are stripped out. 

I have also downloaded a fresh install of Craft to make sure that it wasn't just my install.  I encountered the same issue.  

Can someone tell me what is going on?
This is a feature of "redactor" which is used with Craft to clean and format input. 

To change the settings, you need to change the config in Craft/config/redactor/. See http://buildwithcraft.com/docs/rich-text-fields and http://imperavi.com/redactor/docs/settings/clean/#setting-allowedTags

This is not, however, working for me with iframes, which is a whole other issue.