@meerikram,
Your point is well taken but the video is lacking substance. It would've been great if you would've given some references of Ahadith, Era of Prophet SAWW and the Caliphs who implemented Quran and created the Great civilization humanity has witnessed ever - BUT - Without a well-built argument, without support of logic, references, examples and implementation strategy, this is not going to work.
I respect your initiative but its not a new initiative neither its a new idea to Pakistan. Why didn't it worked in previous few thousand times is because no one provided the implementation strategy for that. If there was an implementation strategy, it wasn't given due effort, time and resources. No one is going to trash Constitution of Pakistan and replace it with Islamic Constitution over-night. How do you think shift from present constitution to complete Islamic Constitution would happen? Having a desire to implement is one thing, making a decision to make that happen is another. At the moment it is only a wish or an advise at most. In order to make this happen, work on the procedure and bring out an implementation plan. Many of us are convinced what is right but no one knows how to get that.
Its probably one is the best times to bring out an alternate governance system and different constitution than what we have in Pakistan but it is not going to be any easier to replace existing non-working system with Islamic constitution. Identify your challenge and prepare accordingly. May Allah help you with this noble cause.