Most kids here start doing both dance and freeskate and then you figure out which you have more of an aptitude for.
You can generally tell a "free skate trained" dancer though, which obviously this girl in the video is. Gorgeous dance and skater but there is just something with the feet. Freeskaters tend to lift their feet higher than someone who has done mainly dance. There is just not as much ease of transitioning from one foot to the other in my opinion. Maybe it is the toe point, I don't know, but dancers just typically have "neater" feet than freeskaters.