Check out example codes for "video tag html5". It will help you in understanding the concepts better.

Code Example 1

<video width="320" height="240" controls>
  <source src="movie.mp4" type="video/mp4">
  <source src="movie.ogg" type="video/ogg">
Your browser does not support the video tag. <!-- Text to be shown incase browser doesnt support html5 -->
</video>

Code Example 2

<!-- Answer to: "video tag html" -->

<video width="320" height="240" controls>
  <source src="movie.mp4" type="video/mp4">
  <source src="movie.ogg" type="video/ogg">
  Your browser does not support the video tag.
</video>

<!-- The <video> tag is used to play videos (obviously) -->

Code Example 3

<video width="320" height="240" controls>

  <source src="movie.mp4" type="video/mp4">

  <source src="movie.ogg" type="video/ogg">

Your browser does not support the video tag.

</video>

Code Example 4

<video width="320" height="240" controls>
  <source src="movie.mp4" type="video/mp4">
  <source src="movie.ogg" type="video/ogg">
  Your browser does not support the video tag.
</video>

Learn ReactJs, React Native from akashmittal.com