Weather Display toy

I made this toy in Blender (3D modelling software), just for fun. Here:

right-hand column, third row. It’s too big to use on a website, though. Can anyone recommend some compression software I could use to reduce the file size? Cheap/free would be nice. I’m trying to work out how to make the background transparent, and I may be able to improve the way it morphs.

Sometimes the animation glitches the first time it runs, but it’s usually OK after that. I don’t know what that’s about.