I often see the whole product free like this -- and then pricing comes about for collaborative features, cloud storage, cloud processing, etc.

So I'm guessing that's how it'll remain free -- as long as you use your own storage space and computing power, you can see use it for free.

It’s a webasm compiled ffmpeg that does all the heavy lifting. Everything is client side. Server is just sending the webpage and saving metadata for the project files. Pretty easy to host something like this at a $1/1k mau level.

The final render is performed in the browser. I’m very much a fan of offloading computationally expensive take to the client so that I can provide this service for free.

The homepage says the videos never leave the browser.