fix: update

docs/javascript/v2/how-to-guides/extend-capabilities/plugins/effects-virtual-background.mdx

@@ -32,7 +32,7 @@ setBlur(blur) {}
 /**
  * Sets the virtual background using the provided media URL.
  * @param {HMSEffectsBackground} url - The media URL to set as the virtual background.
- * Alternatively, the background image can be loaded beforehand and passed to setBackground as objectURL
+ * Alternatively, the background image can be downloaded beforehand and passed to setBackground as objectURL
  * @returns {void}
  */
 setBackground(url) {}
@@ -80,23 +80,21 @@ stop() {}
 
 Callbacks supported by the plugin:
 
-On initialization
+On initialization, after the required resources are downloaded by the plugin:
 
 ```
 const effectsPlugin = new HMSEffectsPlugin(<key>, () => console.log("Plugin initialised"));
 
 ```
 
-On resolution change (on device rotation or when the video aspect ratio changes)
+On resolution change (on device rotation or when the video aspect ratio changes):
 
 ```
 effectsPlugin.onResolutionChange = (width: number, height: number) => {
   console.log(`Resolution changed to ${width}x${height}`)
 }
 ```
 
-
-
 ## Instantiate Virtual Background
 
 The SDK key for effects is needed to instantiate the `HMSEffectsPlugin` class: