Hi Scott,

Try, you have nothing to lose this time. I tried with a YouTube clip and it worked.

In general, iframe(s) are not recommended. Also by default RSFirewall blocks them. Personally I don't use iframe in any popups. They cannot fit propertly to window screen.

and yes, worked quite well.

In means that whole rest is on your hands. Or you can build your own addon version to handle all kind of code.