Overriding or turning off TINYMCE html code checking

How can we turn off the TINYMCE function that checks and strips non-standard html from the html editor. We would like to do this to embed external media, etc. on the Exhibit builder home page as well as certain exhibit/section pages. Is it possible to do this with a special character or by creating a new page option with a text field that does not include the editor?
Any help would be appreciated.

To be clear, are you using the editor that comes up when you click the "HTML" button on the TinyMCE toolbar?

Exactly what code are you trying to include? TinyMCE already allows the object and embed tags.