Alibaba ATH's video generation model HappyHorse-1.0: API test status on Model Studio, open weights availability, Mac local inference reality, and which GPU to pick on RunPod.
Local video generation test on M1 Max 64GB: FP8 fails on Metal, GGUF gets Wan 2.2 running at 82 minutes for a 2-second clip, and LTX-2 hits NaN or unusable KSampler output on MPS.
