I was on YouTube one day, being a ten year old, and all of a sudden I come across a video.
It claimed that it was advertising a movie, and the animation could be described as a mix of those 2d finger family videos and bad flash animation. It started with a guy telling a story about a few kids playing baseball. They break a window and somehow this leads to them getting a magical train. These bad guys try and get the train for themselves. They get the train eventually, and then a inventor guy? I think makes a plane with one of those shark faces painted on. That's as far as I remember.