Advance Comment option on script

I am running social community site which already have comment option for video, audio, photo and blog but its not advance. I want to add feature to comment options which are :-

Adcance comment system like Youtube on Video, Photo, Audio and Blogs

with Following options :-

i) Owner have option on privacy page to choose who can comment i.e visitor, member or friends.

ii) owner also can choose weither to auto approve comment or manually approve.

iii) when owner visit video, audio, photo, blog can delete comment posted by others and can delete or edit posted by him

iv) when site moderator visit any page he can edit and delete and comment.

v) Admin can view all comment from admin panel. View & Delete them, can view filter by approved and disapprove or pending

vi) comment reply, hand up or down feature

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