For younger children: https://watch.formed.org/videos/forgiven-the-blessings-of-confession

For older children: https://watch.formed.org/videos/how-are-sins-forgiven-through-the-sacrament-of-confession

For adults: https://watch.formed.org/a-lent-to-remember/season:1/videos/embraced-in-mercy-the-rite-explained (I encourage you to watch all the videos in this series!)