The <video> tag in HTML5 is creative solution to embed or show vieo contents in a webpage. This <video> tag outdates the use of plug-ins such as flash player for showingup video. Let me explain some brief
To simply show a video
<video width="320" height="240" controls>
<source src="pon_movie.mp4" type="video/mp4">
<source src="pon_movie.ogg" type="video/ogg">
Your browser does not support the video tag.
</video>
a full code with play/pause control
<!DOCTYPE html>
<html>
<body>
<div style="text-align:center">
<button onclick="playPause()">Play/Pause</button>
<br>
<video id="video1" width="420">
<source src="pon_movie.mp4" type="video/mp4">
<source src="pon_movie.ogg" type="video/ogg">
Your browser does not support HTML5 video.
</video>
</div>
<script>
var myVideo=document.getElementById("video1");
function playPause()
{
if (myVideo.paused)
myVideo.play();
else
myVideo.pause();
}
</script>
</body>
</html>