sticky nav with iframe

I am looking to have a sticky nav with an iframe 100% browser window. I see envato has them by default and noticed many others have them in their previews as well. Any help would be appreciated

There may be other, and better alternatives, but perhaps this will work for you?

You want something like this one?

yes, thats what I am looking to do

You can download the code here:
Original poster’s thread: