Azumanga Web Daioh (あずまんがWEB大王 Azumanga WEB Daiō) is a short animated feature from 2000. It appeared on the official Japanese Azumanga Daioh website for a limited time (and was later offered as a paid download for a while), intended to gauge whether there was enough interest for an entire anime series which was originally planned to be released on the web exclusively. Because of overwhelming demand, the anime was instead released as a television series. Azumanga Web Daioh features different voice actors and music from the regular series.
The video opens with Chiyo-chichi flying above several rooftops and after the opening credits, the girls' classroom is seen, where Yomi, Tomo and Osaka are. Tomo suddenly discovers a video camera, which Chiyo-chan explains that she needs for a class project. Tomo takes the camera, and Chiyo asks her to be careful with it. Tomo ensures that it is alright, but Chiyo does not like the idea of her playing with it. Then Sakaki and Kagura discover the camera. Tomo asks the latter to do something flashy. Kagura then kicks the camera. Next, Tomo runs around in the hallway with the camera, despite a note on the wall saying it is forbidden to do so. Yomi yells at Tomo not to break the camera, but the latter ignores her and rushes into the teachers' room. Nyamo tells her that she should at least knock, and when Tomo asks where Yukari is, Nyamo nods in her direction. Yukari is sleeping and wakes up when Tomo approaches her, but quickly nods off anew. They put the video in a box, even though Chiyo expresses doubt about whether it is fine as it is. Osaka buries the video in the schoolyard and puts up a sign next to it saying "time capsule", after which she peacefully walks away from there. Then the waste management company comes and brings down the tree by which Osaka's time capsule was placed. Osaka appears stunned as she soon realizes what is happening.