Hey Cap'n I may have a couple helpful hints for you. Just coaching, not preaching, take it or leave it. I am NO expert by any means. But I have made many dozens of passes, all on t-n-t nites and all in 14 sec and slower RWD cars. Mostly back when you could make passes back-to-back. Last time I went I was gonna try out my 455 but the crowds have become too thick, and I hate sitting around all evening just to make a couple passes. Anyway ... if you haven't already been using these tricks-
Leave when the amber goes out, not when the green comes on. If that makes you red light, stage shallow. If you still snooze even then, stage deep. By staging depth I mean how far past the pre-staged light to launch from. To stage shallow, stop just as soon as the staged light is lit. To stage deep, pull forward until you are almost out of the staging beam.
Once you see some RTs below .5 you're getting the hang of "cheating" against your own reflexes and now can get into launch technique and work on the 60 foot time. That is, how hard to load up the converter. I noticed you idled up just a hair right before launch and that might be what the car needs but its difficult to hit the same RPM in the wink of time you get after staging. Consistently, and thats the name of the game. I have found that often, the "flash" slippage the converter gives you from a plain idle to floor stomp can be more beneficial to getting the car moving than building tension in the converter by powerbraking.
One more- when you're out at clear and safe spot practicing your rate of throttle input to avoid wheelspin, find a word you can say that takes the matching amount of time speaking it, to how fast you can mat the gas. For example, say "elephant" when you launch, and see if you finish the word just as the pedal hits the floor. If you spin, say "elephantish" and so forth, so you have a consistent and tried method of getting the pedal down without cramming or wussing it due to the disorienting effect of a loud car next to a quiet Buick and the general excitement of dragging. Thats a must, being able to do your thing without hearing your car, and in the dark of night. Anyway, if you find that a launch box has particularly good traction, just shorten your "stomp rate word" and floor it sooner.
I'll stop rambling ... I just don't have any other use for these tips I learned from doing it. Never lost a grudge match unless I was clearly outgunned, and even then I have got the best of a few snoozers. Its not unlike video gaming ... you gotta switch that brain to slow-mo because its over so fast. By the way I thought that vid was decent quality but I'm easy to please.