People at an apple wassailing

The video tutorial discusses a traditional ritual involving an old tree. It begins with an introduction to the tree and its decorations, followed by a process to wake the tree and drive away pests using noise. The tutorial then describes how to encourage good spirits to visit by offering cider and cider-soaked bread. Participants are invited to join in singing a song. The video concludes with a cider ritual and a wrap-up of the event.

How does the teacher intend to drive away the maggots and mold?

What is the significance of the cider in the context of the gathering?