Psychtoolbox-Installation.md

@@ -6,10 +6,15 @@ This manual should help you to successfully install **Psychtoolbox** in your MAT
 ## Steps
 
 1. First open your MATLAB as administrator (right click on MATLAB launcher - *Run as administrator*)
-2. Double check if you don't have the version installed by entering in the command window 
+2. Double check if you don't have the version already installed by entering following in the command window 
 ```matlab
 >> PsychtoolboxVersion
 ```
 
+3. It's best to have Matlab R2014b or later. If you have older version, please follow official website instruction or update your version.
+
+4. You need to install couple of things before Psychtoolbox itself:
+
+  - Download and install GStreamer [here](https://gstreamer.freedesktop.org/download/). Download the **MSVC** version, not MinGW.