Two top examples an embedded svg and svgz file with no fallback. At the bottom, svg with fallback a gif.

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The code:
<object type="image/svg+xml" data="gfx/iama_svg.svg" id="player" width="200" height="50"></object><br/>
<object type="image/svg+xml" data="gfx/iama_svgz.svgz" id="player2" width="200" height="50"></object>
<object type="image/svg+xml" data="gfx/iama_svgz.svgz" id="player4" width="200" height="50">
<object type="image/gif" data="gfx/iama_gif.gif" id="player5" width="200" height="50">sorry no support for svg or gif</object>
</object>