Update README.md

Author: NurikHISPlayer

README.md

@@ -22,7 +22,7 @@ Enhance your WebGL games with premium quality video/audio publishing as well as
 
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-## [Try our UnityEngine Video Player SDK Here!](https://github.com/HISPlayer/Unity_Video_Player/releases/tag/v3.4.1)
+## [Try FREE DEMO of our Unity WebGL Video Player SDK Here!](https://github.com/HISPlayer/Unity_Video_Player/releases/tag/v3.4.1)
 
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