Hey Everyone!
I worked hard on this one, creating this using the "Follow Path" object constraint in Blender 3D.
Using a Curve, I created the geometry for the vein/tunnel. Using that same path, I used it as a path for the camera and the objects to follow. I keyframed the objects using autokeying, to create variation in their movement so they don't look stiff and boring. Using some nice depth of field and some material node work, I was able to create this rendered animation in Eevee!
Check my twitter for the wallpaper engine download! :)