Alright , hypermedia problem IS NOW HISTORY
For those who have similar problem , all what you have to do is to put openCV library NOT in processing(the Program) library folder , BUT IN your library folder that is located inside your sketchBook folder.
you see, when you choose from prefrences your sketchBook location and restarted processing after that , processing will create three folder inside your sketchBook new location : library , modes and tools . So you gonna insert the opencv folder containing the library , examples and everything in there.
This for the Hypermedia trouble.
after that, a new error has encountered me "can't parse error text ,unexpected bracket........... (as i remember)" however,this problem is simple to solve , it's just about the name of your sketchBook location if it does contain any character that processing didnt like (mine was "Arduino[Processing" so I had to change it to "ArduinoProcessing" ) so try to avoid using special characters in your FOLDERS names (the parent directories to your skecthBook.