video is full screen

1/* example for "how know video is full screen website" */
2video{
3  height: 80vh
4}
5video:-webkit-full-screen{
6  height: 80vh
7}
8
9video:-moz-full-screen{
10  height: 80vh
11}
12video:-ms-fullscreen{
13  height: 80vh
14}
15
16video:fullscreen{
17  height: 80vh
18}
19