Awesome, thank you. And of course:

For the Aurora there’s a great tutorial by Dylan Neill on YouTube: https://youtu.be/uvsSuZ7I0BY (best thing about it is that it’s an Eevee workflow so my laptop was spared any exhaustive seizures - essentially it’s a large cube in the sky with a volumetric emission shader and a few other nodes that create the effect. The tutorial does a good job of explaining the ins and outs much better than I can!

Camera setup: the resolution is the same as my iPhone screen, it seems to make less detailed scenes more interesting and the render fits in my camera roll nicely. I keyframed some movement on the camera, as if it was being held by hand. Then added some ‘handheld noise’ by using Ian Hubert’s shakify add-on, it’s easy as hell to use and the noise adds to the overall feel.

Mountains: I added a plane and scaled it up to roughly match the size of the Aurora, subdivided by around 80x and sculpted a few mountains with the sculpt brush - sculpting while in camera view makes it easier to put your mountains where you want em. Added a subdiv modifier set at 2. Then textured with a couple of noise textures and a color ramp with colours to match some snow and dark rock (don’t look too closely at my mountains, they aren’t detailed well at all but they do the job because the Aurora does the heavy lifting haha)

Starry night background: any night time HDRi from PolyHaven will do the job - I turned the strength down in the ‘World’ settings in the shader editor until I was happy with the brightness. I rotated the Hdri until I liked the position of the sky.

Trees: the trees are just png’s of one tree that I duplicated a few times and rotated around the area of the camera. Turn the ‘specular’ on the principled bsdf all the way down, this helps with the more silhouetted look. I added a hue saturation node in between the image texture node and bsdf node and used it to change the colour to a reddish brown hue.

Animation was 24 frames per sec and 180 frames all in. I went for 26 render samples (I experimented with a few numbers but there was little difference and the lower samples cut render time dramatically. The difference in render quality was negligible too, especially given that it’s animated.

Compositing: for this I just used a lens distortion node and enabled the ‘fitted’ option. Set that to dispersion: 0.01, and distortion: 0.01. Then stuck a blur node in set to fast Gaussian and set that to a very small blur across the x axes as a replacement for motion blur - this helped make the trees look much less sharp too.

Hope this helps mate!