Strong, but misplaced effort
This is an interesting story from about an hour away from my current residence, I even know some of the emergency responders.
While I suppose this could be funny if you are willing to ignore the facts that its based on a true story where two children lost part of their legs, and that 90% of rail structures in maine are long abandoned making it pretty easy for a pair of children to make a simple mistake that will effect the rest of their lives, I am unable to see past it.
While your talents in shaping a fictional world for your cartoon and comic outlook proved effective, perhaps basic research into events would prove more benificial, looking into the facts of events, and small details that would lean flavor to your videos (such as researching that 97% of Maine's land mass in covered in trees, not desert sands), or perhaps one could try to relate to the material and think about mistakes they made in their own childhood and how many of those are able to be left in the past.
This is, however, a good warning to parents who might otherwise place unearned trust in the capabilties and caution of a young teen, that they might remember the needs of such a young person.