He goes through demonstrating a different number of lights.
He starts with just one, the soft-box. That is always on, isn't it.?
Where does the flash come from when he demonstrates just the soft-box.?
Thank You
At about the 12:30 mark.
You shouldn't watch such kind of YouTube videos in general. !
What you can learn there is "how not to do"

!
To answer your question :
ALL kind of photography light (I know) is working with one "basic/ground" light and the second light
is the flashlight.
He used one softbox as a "master" and all others as "slave" but it is on you wich light you decide
to be master ! (There is no diference - the flashes are in miliseconds).
But what is this guy talking about? How to use many flash light?
(the more money you like to spent - the more flashlights you will get?)
The more lighting sources - the better? It is total nonsence!
There here made some basic failures from his recomandation in adition!
Ground conception of portait lighting : He is telling us -"The main light has to come from the left side" - in short : THAT IS WRONG ! (3':12" usualy from the left side)
so here he is starting with wrong recomandation

!
Notice : Of course portrait lighting need (usually) two main light sources in front (the angle of these lights is the key of "nice looking portrait lighting b.t.w. but never mind)!
AND : The main light has to come from the side your camera framing has the most space !
Regarding " golden ratio " in addition from this direction of the main light it is definied from where the back light (spot light) has to come!
(the spot has to come out of the oposite side to main light)
Example : You model is framed "left" your main light is coming from the right side and "ONE" back light spot is coming from the left side (no need of 2 backlights)!
That is the rule! But who cares about rules as "experienced" photographer?????
Of course you may frame you model "left" - sometimes it is also nice if you then change this rule!
Example : Model is framed left - main light from the left side BUT notice : you should ever set the ONE backlight at the oposite side of main light : that would mean spotlight is coming from the
right side here!
Fellows it is soo simple why are there allways discussions about light setting ?
What I would discuss instead of this basic lighting is the following :
Does it make real sence ?...

!
No it is no "logical" light ! It is artificial light! It is lighting from 2. hand - not the original!
But it was established for portrait photographers AND in studio it is looking much bettter than
without any light

!
The real art is to follow natural light ! There you have one main light (the sun)!
Of course (from reflecting natural sun light) you also get a kind of 2. light source!
Have you ever noticed a backlight in natuure

? (If sunlight is comming from the front)???
If your will anser : "yes sometimes" - you traveled extraterrestrial (a system with two suns)

!
Why a backlight is ALLWAYS recomanded in portrait Studios ? Because from a dark background
the hair is coming real bad !
It is an established compromiss because it make lighting quite "unlogical" !
(with a real "white" background in studio you may need No backlight all

!)
But OK a portrait photographer would come into trouble with most clients :
" You have failed - I noticed there is no backlight in use of your studio set up " would be a sentence
of best informed clients then.
But is it THEN better to use 2 backlights ?

.....if you remember his studio set up (look his Video)
his background is most "white" (very bright) WITH 2 backlight spots

!!!!!
(Where is the 3. backlight ....perhaps from the middle



!)
Comming to the middle of the camera axis in front of a portait- what about a top light ?
Hmmm - the more light - the more shadows - that sounds fine ....or not?
A top light is absolute forbidden (just from my point) but an very small "eye light" can be discussed!
So if you have all lighting bought this Video recomanded - and you still have money wich may be invested in studio what will be the next "light units" you buy?


!
Friends shot portrait outdoor and learn first something about good lighting - after this return to your
potrait studio set up and W O N D E R A B O U T - but pls. don't watch YouTube Videos again!
with regards
