A second video with Fable 5.2 adds an agent that checks the scientific content before generating it

After the photosynthesis animation that Fable 5.2 prepared from a single sentence, its author has published another on cellular respiration. This time they asked a scientific reviewing agent to check the text before it was turned into audio and the images before the video was rendered, to avoid errors. The cellular respiration videos were made with the console version of Claude Code.

They also said they made another video on the same topic with Opus 5.5, without a reviewer, whose quality seemed much poorer; they did not even watch all of it, so they do not know whether it contains errors. The comparison is not controlled, because the model and the reviewer change at the same time.

Separately, they translated the photosynthesis video into Catalan. The voice, from Gemini, seems to them not as good as the Spanish one and has a few small flaws, although the overall result is very good.

Anyone wanting to do the same has two practical ideas here: include a content-checking step before producing, and try translation as a way of reusing the material in another language.