can we use "GoPro Hero 4" camera to shoot video tutorials or elearning courses or moocs?
A GoPro may not be your best tool for this - it has a very wide angle lens, and is targeted at action and sports, mostly.

That said, you can still use them effectively if your scenes can cope with the distortion a wide angle camera brings. They are cheap and convenient. They cope well with various light levels, but the sound quality is possibly not as good as you'd like for interviews, for example.