Not a balk under FED rules, but the first instinct of many umps might be to call balk before realizing that it isn't. I use an inside move to second with a runner stealing from first all the time and, believe it or not, most umpires are quite familiar with the fact that isn't a balk. Notice that he says his pitchers have a mound conference before hand and sort of force the ump to come break it up. At that time, they give him a heads up. I'm sure it will drive the oppo coach crazy, but it's not a balk under NCAA or FED.