DIY - 2018 FORD EXPLORER XLT RUNNING BOARD INSTALL! 

Sorry but not much help. You didn’t show or explain the mounting locations prior to installing the brackets or how the brackets attach to the underbody. Way too dark, can’t really see what you are doing, where you are drilling holes, etc.

It would be nice if you could see what you're doing!

No explained what part to Star with, etc etc

I can’t see what you’re doing with the camera angle that you have

This video wasn't much help. Regardless of the lighting, there was no explanation or close ups of the work you were doing.