That video is very poor, for focusing on a red herring of trying to build a monolith 1gw datacenter in space. There is no plan for such. Instead a mesh of smaller (fits in 1 rocket) datacenters that each have their own solar/radiators auto deployed with the datacluster. Inference does not need fast networking between clusters as models fit in a single cluster easily.

It’s still completely uneconomic because even GPUs that survive 5 years, are worthless after 5 years. Plan is to trash the datacenters every 5 years including the solar and radiators.