How to cut open a tender or young coconut

I have been seeing these tender or young coconuts at my local grocery store and wondered how I could open it.  I found this helpful video to do it.  You do get canned coconut water but drinking it right from the coconut is just heavenly. As a bonus you also get to eat the silky and soft coconut meat. Of course the meat is a great addition to your smoothies.  Here is the video I found helpful...