IPCT member @Dasstrum put together these great Blue Iris video tutorials for the community. You may view the original thread here: Blue Iris Video Tutorials
Basic layout and design
How to review and export
Working with profiles
Zone Crossing Part 2
Geofencing
Cloning Cameras... WHY?
Web Commands (PTZ presets and Triggers)
Web Interface (UI3)
Watchdog Feature
Picture/Text on Motion Detection
Flagging and Protecting Clips
Clips and Archiving Part 1
Clips and Archiving Part 2
Record Tab Basics
Zone Crossing
Zones and Hotspot
Installing UI2/3 remote view web page
Triggers: Object Detection
Camera Resolution/Megapixel
Quick Tip: Saving and restoring settings
Triggers: Basics of Motion Detection
Working with profile schedules
Stunnel
Blue Iris Tools Part 1 - Basics and Weather Overlay