There are no layout choices here, but there is no limit on the media you put in the page.
Images
Choose image opens your library, or drag a file straight onto the page. Every image takes alternative text — the description a screen reader announces and search engines read — and an optional caption.
Click a placed image to open its detail: replace it, change the caption or alt text, or turn on zoom so a reader can open it full size. That matters for screenshots, where the detail is the point.
Card image is separate. It is the image used when the page is shared — in a message, on social, in a link preview.
Video
Paste a YouTube or Vimeo address, or upload a file. Embedded video is loaded from the no-cookie domain, so a video on your page does not set tracking cookies on your readers.
A two-minute video of you explaining how you would approach somebody's problem is the highest-value thing most people can put on their page, and almost nobody does it.
Audio
Same shape. Paste an address or upload a file, give it a title.
What you cannot do
Arrange things side by side, wrap text around an image, or set a width. Media sits in the flow of the page at one size.