(How) can I embed something with an iframe code into powerpoint 2010?
We built an Add-in for this called LiveSlides that works with PowerPoint 2007+ on Windows and PowerPoint 2011 and Keynote 5.2+ on Mac.
You may download the add-in for free at https://www.liveslides.com/
PowerPoint is not a browser, so it doesn't know what to do with HTML/embed code.
However, you can embed a web browser control in PPT and include your HTML in that.
Easiest way to do this is with Shyam Pillai's LiveWeb add-in for PPT: