Apparently, this piece was streamed in real-time, GPU-to-GPU, from WebGPU to TouchDesigner for post-processing, using a custom app developed by Creative Developer Renaud Rohlinger. It seamlessly streams visual content from the web into native desktop applications with just one click and no CPU usage for texture transfer.
Here's a glimpse of this The Great Wave off Kanagawa brought into TouchDesigner:
Renaud Rohlinger
For more updates on this app and other projects, check out the developer's frequent posts on his X/Twitter page: