how to set video size html

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 

1#vidstrip {
2    position:relative;
3    padding-top: 0;
4    margin-top: 250px;
5    overflow: hidden;
6}
7.vidstrip-text {
8    line-height: 2.1em;
9    padding: 1em 4em;
10    color: white;
11}
12.vidstrip-section {
13    position:absolute;
14    top:0;
15    left:0;
16    padding: 0;
17    z-index:-1;
18}
19.vidstrip-section, #bgvid {
20    width:100%;
21    height:auto;
22}
23