Turban (also called a dastaar) is a headdress worn mainly by Sikhs (but also by other people) and is characterised by it's usually distinctive shape (the video shows illustrations of people wearing turbans) and the fact that it's usually a long length of fabric wound around the head many times.
A turban is not equivalent to a tichel or hijab. A patka is sort of like a tichel, I suppose, but it's still not a turban.
Kesh... well, that one is complicated. I am led to believe that 'kesh' means hair, while 'rom' means body hair specifically. Most of the time though, Sikhs say kesh = all hairs, anywhere.