Below are some Moodle guides in video format:
Moodle Quiz Video Series
This is a collection of short video segments focusing on the processes and procedures involved in the creation and administration of a Moodle quiz.
Quiz: Question Bank - steps on how to build your pool of questions in the question bank using different question types
Question Bank: Multiple Multiple Choice with Multiple Answers - techniques and options to consider when using this type of question
Question Bank: Drag & Drop/Matching
Question Bank: Numerical
Question Bank: Essay