The pianist is Lise Linde Kronenberg, filmed on her first birthday. It's not clear whether the piano music was overdubbed on a pre-existing melody, or whether the orchestral accompaniment was created specifically to harmonize with her extemporaneous creation, but the result is fascinating. Try playing it for someone who can't see your monitor, and ask them what they think of this "nouveau" piano style.
That's totally ridiculous. There's no way the notes I see her hitting would make those nice chords.
I'm sure the parents, or whoever made the video, intended it to be a joke, not to trick people, but the real audio from this would have been painful clashing discords.
Yep, at most the resulting composition is cleaned version but definitely there are some notes that are not appearing on the video.. It would be interesting to hear what those toddlers would make with an instrument that plays only notes that fit to some harmony.. and that harmony changing accordin to what notes have been played.
I'm sure the parents, or whoever made the video, intended it to be a joke, not to trick people, but the real audio from this would have been painful clashing discords.