How To Easily Come Up With A Winning Youtube Niche

I've learned that one of the most important factors to succeed as a YouTube marketer is to start in a narrow niche. This will ensure less competition and guarantees high ranking of my videos.

Meanwhile, any time I go on research online; I do find it almost impossible to spot the so called narrow niches. Everywhere seems to be saturated and I do wonder where the gurus do go to lay hand on these rare niches?

So, I want to call on the alpha and omegas of YouTube to come and their tips here.