I don't think your point really applies to my question, which was more about what exactly was doing the heavy lifting of the video exporting. As a point of ref

I don't think your point really applies to my question, which was more about what exactly was doing the heavy lifting of the video exporting. As a point of reference, just this week I saw someone on Observable experiment with WASM-compiled encoder packages for that exact reason[0][1]. Svelte seems really nice and lean though, I do agree with that [0] https://www.npmjs.com/package/h264-mp4-encoder https://www.npmjs.com/package/h264-mp4-encoder [1] https://observablehq.com/@rreusser/h264-mp4-encoder https://observablehq.com/@rreusser/h264-mp4-encoder