video element The HTML <video> element is used to embed video content in an HTML or XHTML document, base element Specifies a base URL for all of the relative URLs in the document to use, nav element The HTML Navigation Element (<nav>) represents a section of a page that links to other pages or to parts within the page: a section with navigation links. These elements allows child elements from interactive, embedded, heading, sectioning, phrasing, and metadata content categories.
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