Currently, this is my favorite test prompt for AI coding tools:

    Make a simple HTML page which
    uses the VideoEncoder API to
    create a video that the user
    can download.

So far, not a single AI has managed to create a working solution.

I don't know why. The AIs seem to have an understanding of the VideoEncoder API, so it seems it's not a problem of not having the infos they need. But none comes up with something that works.