but not if he really wants to scout

I always get both the mothership core & stalker as part of my build. Back during WOL days you -had- to get a sentry in order to wall off ramp in time to stop early marine pushes or etc.

Most of the time I will use a time-warp in order to kill off the reaper scout,

wouldnt most terrans assume its either proxy stargate or some kind of twilight council shenanigans and get missile turrets anyway?

how do you make it work?

i lost to a protoss in a 24 minute game who had 74 apm, AMA

That's fucking awful, and I can relate

Most terrans do put turrets in their mineral lines, or at the front of their base. But it doesn't matter, because I don't always need to go after the SCV's, micro'ing the Warp prism to kill all the marines works WAY better. Even if they scan? They don't have stim, they can't kite. If my DT's start to get damaged? I'll pick them up with the prism, this causes them to targetfire the warp prism as I drop the DT's to kill all of the marines again. By this time, they have so few marines or units left, that I can just pick-up if they fend me off, drop all my DT's, warp in 1 more and make 2 archons. Then I go back in about 25 seconds later and drop 2 Archons in their base vs their un-upgraded bioball.

It's wonderful.

that doesnt seem possible.

He skips mothership core and the first stalker, you can early gate and do a low economy opening. It's possible, and most likely mainly used in team games where people don't scout, or don't scout for long.

How many DTs does it make at 6:15?

No clue, I don't do his version of the build. I'm just stating how it could be done. I think if done right, it'll be 2, with a 3rd one very shortly after