Wherever a central juror assembly room is provided for the courts in a county, the administrative judge, where practicable, shall designate a judge in each county in the district to greet newly summoned jurors and generally explain their responsibilities while serving as jurors. In courts not using a central juror assembly room, a judge or justice of the court in which the jurors are serving, where practicable, shall greet newly summoned jurors. A filmed or videotaped greeting from a judge may be used.