update README.md

README.md

 
 ```bash
 $ npm run build
+```
+
+
+## Install package.
+
+```bash
+$ npm install https://git.links123.net/links123.com/video_player.git --save
+```
+
+## Usage
+
+```javascript
+import { DefaultPlayer as Video } from 'react-html5video';
+import 'react-html5video/dist/styles.css';
+
+const Player = () => (
+  <Video autoPlay>
+    <source src="demo.mp4" type="video/mp4" />
+  </Video>
+)
 ```