It is the uses to which it is put that determine its value to society.

lorry

整体为强调句，the uses 是后面 determine its value to society 的主语，先去掉to which it is put  就是It is the uses that determine its value to society.一个完整的强调句，to which it is put 是uses 的定语从句，这里的it代指前面讲到的电视节目的内容。