Authors are required to complete a 7-10-minute audition video covering a topic that aligns with their area of expertise. Pluralsight provides a comprehensive outline describing what they are looking for during this process and also provides detailed feedback on your submissions.
I made two submissions: my first attempt and my second attempt after feedback before receiving an offer.
Overall, I have no complaints; however, I am concerned that the onus of responsibility for quality control falls completely on the Author and Pluralsight doesn't seem to offer any assistance helping with improving submitted content.