This is polar coordinates mapping, and this is HDRI texture. So make sure you import it as HDRI.
You can also google for free HDRI textures, there is nice website with ton of those.
Now solutions:
- get (i think) any template from architectural visualisation
- they all have hdri blueprint for skybox.
- migrate that skybox blueprint into your project and change texture for one you want
Or.
-get that project from template and just recreate skybox material
However i am not sure if that material uses polar coordinates.
This is how you use reflection vector on skybox image, if you use this you do not need UVs on skybox sphere. And this reflection vector method uses polar coordinates just like texture you have:
For rotating this image, you need to rotate that camera vector before using Transform vector (or maybe after) 
And to know how you rotate. Hmm You kind of need to calculate UP vector on earth in place where is your camera/player at time. then rotate camera vector in material to match that earth vector. You can calculate earth up vector in blueprints, then pass it as parameter into material.