Thanks - we're in the process of redoing the whole site so I didn't notice those were busted. Fixed now :)
Our browser support is still a work in progress (and browsers don't support WebGPU yet), so we primarily run on windows/linux/macOS natively right now. Once that improves we will replace them with actual browser demos.
also, for a cross-platform tool i expected that clicking the images would take me to live demos that work in a browser, not mp4 and png files.