I just watched the replay. Here are some tips for you:
1. I haven't played much on Hunters, but on a map with 8 different starting locations, I'd use 2 SCVS to scout. You could technically scout him at the last spot, and by the time you do, he could have teched straight to DTs or lurkers for example. I'd send in the second SCV about 20-30 seconds after your first one is sent out.
2. You did not spend your money fast enough (macro). A basic rule of thumb it to keep making factories whenever you find yourself having more than one unit in queue... I believe you had 2000+ minerals at one point.. you should never have that much..
3. You may want to make a comsat a lot sooner, especially on a map such as Hunters.