How to insert mp4 video in HTML code example

Example 1: how to add a video playing on a html page

<iframe width="420" height="315"
src="https://www.youtube.com/embed/tgbNymZ7vqY">
</iframe>

Example 2: adding mp4 in html

<video width="400" controls>
  <source src="mov_bbb.mp4" type="video/mp4">
  <source src="mov_bbb.ogg" type="video/ogg">
  Your browser does not support HTML video.
</video>

<video width="400" controls>
  <source src="mov_bbb.mp4" type="video/mp4">
 
  Your browser does not support HTML video.
</video>

Example 3: html5 video player

<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>