Web sdk not showing video icon

I implement zoom web sdk in my website but when website open in mobile browser video icon not showing and chat not working properly. also onUserLeave event not working. In mobile browser not responsive.

Version detail here

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<link type="text/css" rel="stylesheet" href="https://source.zoom.us/2.9.5/css/bootstrap.css" />
<link type="text/css" rel="stylesheet" href="https://source.zoom.us/2.9.5/css/react-select.css" />

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<script src="https://source.zoom.us/2.9.5/lib/vendor/react.min.js"></script>
<script src="https://source.zoom.us/2.9.5/lib/vendor/react-dom.min.js"></script>
<script src="https://source.zoom.us/2.9.5/lib/vendor/redux.min.js"></script>
<script src="https://source.zoom.us/2.9.5/lib/vendor/redux-thunk.min.js"></script>
<script src="https://source.zoom.us/2.9.5/lib/vendor/lodash.min.js"></script>
<script src="https://source.zoom.us/zoom-meeting-2.9.5.min.js"></script>