There are several unproven or misleading claims surrounding this video.
It does not show damage caused by a 12-year-old boy, as the original poster clarified, and claims that the damage was instead caused by an abusive ex also do not appear to be substantiated, though cannot be ruled out entirely.
Skeptics' claims that it is a ploy to gain donations are also unverified. The second video at least confirms the extent of the damage, though it doesn't amount to a confirmation that it was caused by a 15-year-old boy with mental health issues.