Struggle in the cold-Animation

i was a bit bored so i made a small animation, a very fast render, so its very grainy, rendertime per frame: 8seconds (lux-render, as usual)
i made the animation much smaller cause my gif maker program doesnt compress the file so it dont work fluent in the huge size, you can see it in the pictures below
im sorry for the huge files (4mb/12mb) but i dont have idea how i can make them smaller

link for the small but fast and fluent verion:
[link]