Three videos all covering the same general topic, but in different formats:

• Screen record with audio only (unprofessional): Garageband: How To: Auto-Tune/Sound Professional
• Screen recording with actor off screen (unprofessional): How To Mix Vocals in Garageband
• Screen recording with actor on screen (professional): Mastering With Garageband 10 Tip & Tricks

Here are videos that helped me with making a formula for making videos:

• How to Grow with 0 Views and 0 Subscribers
• Increase Retention

An incredibly well done video at Roehampton University, An introduction to academic writing and research. (This video was created by the Walden University media team.)

Excellent marketing video by Vidyard Video Intelligence: The Video Intelligence Platform

You voted and we listened.  You decided on a standalone video about how to take a screenshot.  You asked for basic, informal, and for Shawn to wear a blue shirt. 

Best Practices: Screencasts