Closing credits is required when producing a long form for original programming clips. Below should have the following and you may add other more positions that are not mentioned below if needed.:

Executive Producers
Directed by
Program Director
Post Production Supervisor
Script/Written by
Hosted/Voice by
Video Editors
Graphics and Animation
Sound Engineers
Content Coordinators

Examples

1. https://www.youtube.com/watch?v=IK7PdEL8TWk
2. https://www.youtube.com/watch?v=nzk0tHBmN_8

Download the credit template here.