doc/mkdocs-material/material/templates/.icons/material/picture-in-picture-bottom-right.svg

<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M19 11h-8v6h8zm4 8V5c0-1.12-.9-2-2-2H3a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h18a2 2 0 0 0 2-2m-2 0H3V4.97h18z"/></svg>