Teach me anything (https://tma.live) generates an explainer video from an instruction. A video generated as an animated and commented presentation with text, illustrations, and voice (only one female voice available even if specified in the instruction).

Once a video has been generated, it can be queried in a chatbot-type interface: the response is generated in the form of a new video. The duration depends on the subject being discussed.

French very well supported, some English accents sometimes present in the voice and some superimpositions.

Model and publisher not specified (domain registered in Iceland), however, seems to be driven to remain on educational domains (tests on instructions that may be “problematic” performed: rejected).

Mp4 export and sharing by copy/paste of the url.
Free, no accounts required, and seems unlimited.