The video tutorial explains the queue data structure, which operates on a First In First Out (FIFO) basis. It covers the implementation of a queue class in JavaScript, including methods like enqueue, dequeue, peek, and length. The tutorial demonstrates how to add and remove items from the queue, check if it's empty, and view the front item. The video concludes with testing the queue implementation to ensure it functions correctly.

What is the main characteristic that differentiates a queue from a stack?

Describe the enqueue method and its purpose in a queue.

Explain the dequeue method and how it operates in a queue.

What does the peek method do in the context of a queue?

How does the isEmpty method function in a queue implementation?

What happens to the front item of the queue when an item is dequeued?

Discuss the significance of the count property in a queue.