Is it possible to export an animation as GIF format ? or even a video?
Yes. You can find all export options in the documentation: Export - Spine User Guide
Hello, thanks for your answer.
You can use something like gif.js https://jnordberg.github.io/gif.js/
Playback your animation using the Spine Runtimes, and each frame, pass the canvas to gif.js to add the current frame to the GIF.