How does Heavily Obscured work?

In one of the dungeons in my campaign, there is a glyph of warding that creates Stinking Cloud (to bully my players while the Yuan Ti immune to poison attack them) and one of the effects is the area is Heavily Obscured.

After reading the rules saying "You have the blinded condition while trying to see something in a Heavily Obscured space", I am a little confused. Does "in a Heavily Obscured space" mean while you're in a Heavily Obscured space (because you can't see anything outside) or when the thing your seeing is in a Heavily Obscured space (because it's hard to see something that's in the  HO area) . Both make sense, so it is hard to figure out which one is the correct interpretation.

This one is just a hornet’s nest.

There is no universally accepted answer, with lots of people coming firm on both sides. 
Rather than re-litigate, I’ll say the best choice is to make a ruling, and then stick to it in the future, whichever way you decide to go.

Alr, Ima choose whichever lets me bully my players (they my friends dw) via them not being able to do anything and being slapped by a bunch of snake people 

Both. 

A Heavily Obscured area—such as an area with Darkness, heavy fog, or dense foliage—is opaque.

Quote from Xalthu >>

This one is just a hornet’s nest.

There is no universally accepted answer, with lots of people coming firm on both sides. 
Rather than re-litigate, I’ll say the best choice is to make a ruling, and then stick to it in the future, whichever way you decide to go.

Yup. You know who you are out there. Leave it alone. The GM has already decided what he's going to do.

It's the second one.

The term Heavily Obscured area describes an area.  Specifically, it's an area that is heavily obscured.  Therefore, the inside of that area, including everything that is located within it is impossible to see, because they are obscured from view.  So, when you attempt to look at such things, you are mechanically blinded while trying to do so.

Quote from Erik_Soong >>

Both. 

A Heavily Obscured area—such as an area with Darkness, heavy fog, or dense foliage—is opaque.

 This is my ruling too, but as Xalthu said: "There is no universally accepted answer, with lots of people coming firm on both sides."

ZardiacTheW1zard, here's the most recent thread about this topic in the subforum: a fog cloud and an archer walk into a bar. I left some links to similar threads in this reply.

My humble recommendation would be to revisit those and try to get a sense of the consensus on your own.

EDIT: for clarity.

Read some of the things in the "A fog cloud and an archer walk into a bar" bit

Good to see that I'm not the first person baffled by this lmao

How i rule it a Stinking Cloud is opaque, thus obscure vision by blocking Line of Sight through it meaning you can't see within nor past it.