YouTube的视频天然带一个可抓取的全文：自动转写。哪怕里头有口头语、听写错误，但对机器来说已经足够形成一份带时间戳的粗加工文稿，方便按主题切片、对齐问题，再从中挑出可以引用的句子。
但2025年，这个核心逻辑出现了裂缝。DeepSeek的横空出世，彻底打破了“算力至上”的行业迷信——其开发的模型仅用2000块H800 GPU，就实现了与Meta Llama 3（使用1.6万块H100）同等的性能，训练成本仅需560万美元。
。体育直播对此有专业解读
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Google, Microsoft and Amazon among companies using algorithms and AI to influence what crops are grown and how, say critics