Html elements sub, video, and h3

sub element Specifies that the enclosed text should be rendered in the browser as subscript, video element The HTML  <video> element is used to embed video content in an HTML or XHTML document, h3 element Heading Level 3. These elements allows child elements from interactive, embedded, heading, sectioning, phrasing, and metadata content categories.

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sub sub and video, sub, video, and h3

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