Yes and no.
Of COURSE you'll be more likely to get great ideas or combine to make something great when you work with other people with a shared vision.
But nobody can deny the existence of "aha moments" when alone. They happen! That should be obvious to anyone who's ever had the experience of realizing the solution to a problem or coming up with a great melody--while taking a morning shower or doing the dishes at night. Genius-level "aha moments" happen too, just much less frequently.
The video begs the question: if Edison, Einstein, etc. were just one of many collaborators, then where did the individual collaborators get their ideas from? Who was I collaborating with when I was taking a shower and got the great melody idea that I brought to band practice the next day? (Uh, wait, don't answer that.)
The much harder truth to swallow, but still a truth, is that lone inspiration doesn't happen consistently. Meaning, it doesn't happen to all people equally, and it doesn't happen to most people on a reliably even basis.
I think a good message to take away from the video is that you shouldn't rely on lone "aha moments" for creativity (at least not if you've got deadlines or if other people are depending on you). Collaboration gives you much greater reliability and also gives you much greater ability to fine-tune. But it would be silly to not expect lone "aha moments" to happen, or to dismiss them as a "myth" when they do.
