html video size

1// width="320" 
2// height="240"
3
4<video width="320" height="240" controls>
5  <source src="movie.mp4" type="video/mp4">
6  <source src="movie.ogg" type="video/ogg">
7  Your browser does not support the video tag.
8</video>
9
10**********
11or Responsive
12*******
13<style>
14  video {
15    width: 100%;
16    height: auto;
17  }
18</style>
19