Red vs. Black Exercises in the Daily Workouts Means What?

Got The Best Workout for Natural Lifters. Downloaded it, I see in the daily workout pages, for the list of 5 or whatever exercises that day, some are listed in red and some are listed in black.

What does this mean? Don’t see this defined in the book. Thx.

The exercises in red are simple hyperlinked to a video of how to perform that movement.

Hah! Thanks, thax! I fooled myself printing the thing!