Update setup-guide.md

setup-guide.md

@@ -140,12 +140,14 @@ Once all this process it’s done, associate the **RenderTexture** to the script
 
 ## 2.3 Configure HISPlayer Properties
 ### <ins>License Key</ins>
-Input the license key that is associated with the SDK. If the license key is not valid, the player won't work and will throw an error message. License key is not required for Unity Editor usage.
+If you received a license key from HISPlayer, please input the license key in the **License Key** field. 
 
 <p align="center">
 <img src="./assets/license-key.PNG">
 </p>
 
+If the license key is not valid, the player won't work and will throw an error message. License key is not required for Unity Editor usage.
+
 ### <ins>Multi Stream Properties</ins>
 Use **Multi Stream Properties** to set all configurations needed for multi streams. It starts with 0 elements. Each element added has its own configuration for multiple players and corresponds to 1 Render Surface. If you just need a single stream, then you just need to add 1 element with 1 URL.
 * <span style="color:blue">**Render Mode**</span>: Select the render surface. It can be RenderTexture, Material, RawImage or NONE.