For those who want to know the source of this wonderful animation, this was made by the London-based The Line animation studio. The animation is called Dear Alice, and here's the original source with all the full credits. The score was made by a long-time Ghibli composer. The animation was made for a dairy commercial (and the dairy company seems to be as eco-friendly as is possible for a dairy company if it disappoints you the animation is made for an ad).

I found this on reddit's solarpunk.