I liked when Jeff said, (in his video ) "sometimes he just sets up the flags in his yard and observes the wind and flags, when he can't drive to the range."
As an aside, I would love to see more AGN posts (or related bench rest articles) as to how experienced BR air gun enthusiasts describe how they are using the flags, and interpreting good wind conditions, while shooting. I have searched on both GTA and AGN, and I can't seem to locate good descriptive 'how to' flag reading posts. Sort of like an instructional YouTube video would be most helpful. i.e., how to handle left to right, right to left at different angles, tail winds, head winds, some do's and don'ts, when to defer to your near flag vs. far flag, and visa-versa, which winds to avoid, etc....
Practicing by yourself (without a knowledgeable mentor watching you ) and accidentally doing things wrong with your flag reading, is a slow process for learning. I have been using flags for about a year by myself, and honestly, I'm still not comfortable with what I know vs. what I don't know.