Developers say Chinese AI labs lead US rivals in video generation, as ByteDance and Kuaishou train models on vast short-form video libraries from their own apps

Chinese AI labs have taken the lead over American competitors in video generation — one of the most competitive frontiers in generative AI right now.

The secret weapon? Data. ByteDance and Kuaishou are training their models on enormous short-form video libraries harvested directly from their own apps. TikTok's parent company and its rival sit on goldmines of user-generated video content, giving them a training data advantage that US labs simply can't match.

Developers working in the space say the gap is real. Chinese models are producing higher-quality video outputs, and the data moat is a big reason why.

It's an interesting reversal. The US has dominated most AI benchmarks, but video generation is shaping up as a category where China's platform giants — and their billion-user content ecosystems — give domestic labs a structural edge that's hard to replicate.