redme update

README.md

@@ -51,7 +51,37 @@ Or use `<source>` tags:
 
 ```
 
-There's also a [working example](example.html) of the plugin you can check out if you're having trouble.
+## Source options
+
+Sources can passed to player using `updateSrc` method or `<source>` tag as shown above. Avalible options for each source are:
+* label - `String` (required) is shown in menu (ex. 'SD' or '360p')
+* res - `Number` is resolution of video used for sorting (ex. 360 or 1080)
+
+## Plugin options
+
+You can pass options to plugin like this:
+
+```javascript
+
+videojs('video', {
+      controls: true,
+      muted: true,
+      width: 1000,
+      plugins: {
+        videoJsResolutionSwitcher: {
+          default: 'low'
+        }
+      }
+    }, function(){
+      // this is player
+    })
+```
+### Avalible options:
+* default - `{Number}|'low'|'high'` - default resolution. If any `Number` is passed plugin will try to choose source based on `res` parameter. If `low` or `high` is passed, plugin will choose respectively worse or best resolution (if `res` parameter is specified). If `res` parameter is not specified plugin assumes that sources array is sorted from best to worse. 
+
+## Example
+
+[Working example](example.html) of the plugin you can check out if you're having trouble.
 
 ## Methods