I'm using an embed code, pasted into a markdown block, to try and link to a website prototype hosted on the Adobe servers. It overlaps the space it's meant to sit in, rather than sizing proportionally (see screengrab).
The embed code I got is <iframe width="1920" height="1080" src="https://xd.adobe.com/embed/46fe53f9-9d26-4448-827f-88b5d8d04224-13ad/?fullscreen" frameborder="0" allowfullscreen></iframe>
I don't know anything about code so I can't tell if this is where the problem is happening. The page isn't currently live because it's not ready yet.
Any assistance gratefully received.