I once built a simple website for a Netflix show where you could enter some text and it'd be played in an animation, but you could also save/share a video of it

I once built a simple website for a Netflix show where you could enter some text and it'd be played in an animation, but you could also save/share a video of it. It was so much easier to build the animation in canvas for the site and just replay it to get frames for a video on the server than to try to make the video in some other environment and then show it in the browser.