Hmm that is really hard for us to do, because our game heavely relies on 2d art pieces, which are animated seperately in code. So an animation may include like 100 art assets already.
The framework we use doesn't support playing videos (yet) on browsers, so that way of optimizing isn't viable for us (and also removes the ability for some randomization and other code related stuff). The amount of files/art we're going to create and use will increase each version, so we're bound to reach that limit sooner or later.
Thanks for your help though!