sideline play

[stewcall]

Team A taking the ball out on the sideline
A1 attempts to put the ball in play.
A2 and A3 sets a pick along the sidelines for A4
A4 is guarded very closely and briefly runs out of bounds to avoid the closely guarded B4 player and the ball is successfully passed into A4 back safely inbounds.

I watched this play 4 times and nothing was called. To me this is a violation having two offensive players out of bounds once the ball was put in play.

Then I got thinking, if this same play occurred after a made basket would it still be a violation? A rule citation would be helpful (NFHS)

thanks
Stew in Va
CVBOA