From the YouTube description
Unicef commercial against war. Designed as a UNICEF advertisement, and with the approval of the family of the Smurfs' late creator Peyo, the 25-second episode was shown on the national evening news after the 9pm timeslot to avoid children seeing it. The scene starts with happy peaceful Smurfs and butterflies, who are then bombed by warplanes, ending with a lone Baby Smurf surrounded by dead Smurfs. The final frame bears the message: "Don't let war affect the lives of children."