Extended Data Fig. 3: Frequency of videos per calendar year.

Panels a–g present the Xinhua-pretrain, ST-pretrain, Aier-SH-pretrain, Aier-HZ-pretrain, Aier-JF-pretrain, GZ-pretrain, and Kandze-pretrain datasets, respectively.

Panels a–g present the Xinhua-pretrain, ST-pretrain, Aier-SH-pretrain, Aier-HZ-pretrain, Aier-JF-pretrain, GZ-pretrain, and Kandze-pretrain datasets, respectively.