Last Of Us particle effect

How would one go about replicating the particle system in the last of us?
I haven't heard of a name for these types of particles and it seems this is the only game that uses these types of particles.
The way the particles seem to change as they get closer to the camera.
Would it be relatively easy to do or is it an advanced technique?

https://imgur.com/sJS1H8y

 

That video is too low resolution to see. If you mean the small dots, check out some VFX graph tutorials.
You can scale or change particles depending on age, maybe with the new 2021 lts also with data from the camera distance

 

Try VFX Graph in Unity, this sort of effect is quite common with it. It's basically just particles that are modified in some way by noise. This is also achievable in the regular built in particle system as well (also under 3D noise).