unfortunately the concept of hand-timing means nothing to you - it is usually upto 0.2s slower than auto
there was no "official" clocking for that split & there are none for relay splits
even the vid shows only a head-on view of the takeover & despite him stumbling at the start, he doesn't stop, so it is still a degree of flying run, albeit not full ~ 0.8s advantage, something ~ 0.1 - 0.2s
at best, putting in hand-time error, small degree of flying start, you are getting
45.7 + 0.2 + 0.1 or 0.2 = 46.0 or 46.1 auto
running wide on a straight takes little off compared to curve & easing off at the line was minimal
that is more like 45.80/45.90 open 400 at best
you obviously don't understand the concept of
"who are 2 fastest all time ?"
you look for those as the likely type of candidate runner to even further break the wr
the 2 fastest are 0.6 - 0.7s faster than next on the list who was a 800/1500 guy
the 1st 2 are essentially pure 800 guys
use your brain & realise these are the future candidate types ( pure 800 guys ) who will most likely further improve the wr - & if 1 does so, then 1'40.0 may be on horizon
the days of combined 800/1500 guys breaking the 800wr are over for now - the wr has gotten too quick
you own example of 45.0/3'30.0 shows this
45.0 / 3'30.0 ->1'41.54
even 3'30 endurance won't get you close to current wr for a 45s guy
it woud need 3'24.5 endurance for a 45.0 guy to run 1'40.00
therefore you don't look for 1500 endurance anymore ( when a 3'24 guy turns up, you can cahnge that view ) - you look for increasing 400 speed & just enough endurance to 900m or so
the likes of rudy/kip only have specialised endurance for little over 800m - 900 or 1000m & in absence of 3'24 guys appearing anytime soon, pure 800 guys are the ones to further break the wr