Perennial basil (?!?)

This question sort of started with broad beans, but didn't end there. 

As an experiment here, I am planning to try growing some broad beans, which are supposed to be very difficult to grow here (but I like a challenge!).  I was watching a video on YouTube https://www.youtube.com/watch?v=lZn2H__hI30 about how to tell when broad beans are ready to pick.

Late in the video, the presenter mentions something about the scent of some perennial basil. . .  WHAT   I have never heard of perennial basil before.  Briefly looking it up, it seems like the same species as regular basil (?).  I guess just more hardy? Is it usually grown from seed, same as annual basil?

Does anyone have experience growing and using perennial basil?  Is it used in the same way as annual basil?  does it provide fresh basil in winter?  Anything you can share about this herb would be appreciated.

Thank you New Shoot.  Looking up more information online, it is very confusing.

Several articles point to perennial basil, and three varieties of Ocimum basilicum spp.: Greek columnar basil, white perennial basil, and pink perennial basil.  Like this article: https://www.thegardener.co.za/grow-to-eat/herbs/perennial-basils/

But some sources at least call Greek Columnar an annual.

This source describes the white perennial basil: http://www.booyongconservation.com/white-perennial-basil/

Another "perennial basil" doesn't seem to be a basil at all, but is called wild basil and is perennial (Clinopodium Vulgare) https://savvygardening.com/perennial-basil/

It could be that plant in the video was holy basil, as you indicated.  I think that might also be a different species from culinary basil.

The Chinese & Nepalese plot holders here, grow some thing they call Chinese Basil. It doesn't look, smell or taste like the Basil we grow, they just cloche it over winter, so frost doesn't kill it.
One of them said it was Shiso This is listed as Perilla frutescens, but RHS says that's an annual - but what they grow is perennial. Not much help is it?