The Video is rather immature to my mind. When projects are crystallising, it is inevitable that dissimilar parties will sometimes come up with the same ideas. To prove that one has copied from the other is an exercise in futility. The essence of this particular video is merely sarcasm, without any solid foundation. I am sure an opposing video could be made showing another point of view. The world is still arguing, for example, as to who split the first atom, or invented the first IC engine.
If you research the history of the personal computer, who will you find as the inventor of a "windows" GUI. Not MS: not Apple: Not Mac. It was a small company, (in those days), known as Xerox. With a lack of imagination, they sold the idea to the young boy by the name of Bill Gates.