I have kept a log book on my hunts for over 30+ years. I base very little of my knowledge on what "YouTubers" tell me.. In my logs it shows the 2nd lockdown occurs around 26 to 28 days after the first lockdown. There is chasing that will occur earlier. Of course does being of varying ages can come in heat at anytime from September to February, I have seen mature bucks chasing in late Feb in South GA. You can theoretically see chasing anytime in the fall or early winter. Although the bulk of the does come into heat the first rut, this is nature's way of assuring they are not born too early or too late.. I will say believe it or not there is a lot to be learned from "some" YouTubers most of the guys I watch are whitetail biologist , some are just guys with tons of experience, some I do take with a grain of salt. I have been deer hunting over 45 years and still learn something new every deer season, as would hope most of you do as well, none of us knows it all.. I give up boys and girls. Chalk me up as another the clique has run off. You guys have a blessed day..