Here is my drill bit basics video to go along with my basic machining class at Parkland College. Check out the other videos in the series:

Reamer Basics:    • Reamer Basics  
Countersinks and Counterbores:    • Countersinks and Counterbores  
Endmill Basics:    • Endmill Basics  
Consistent Countersinks and Spot Drills:    • Quick Machining Tip #4  Consistent C...  

Class handout: https://drive.google.com/open?id=1znU...