Story Maps: Add Embed Function for Map Tour

[SaraJL]

If it was possible to have an embed function in the Map Tour pop-ups, this would be a really useful tool!

I know that we can upload images, audio, and link YouTube videos - but if there was an embed option, I could embed interactive infographics (VR tours, animated graphics, etc.)

Or if it not possible to do in the top of the box, add the embed function to the text portion of the pop-up.