After going through many rounds of actual weddings with videographers, I still find it very hard to control my white balance. The warm light set up by the video man make my background alot more yellow.
set up with video light
wb custom 3500k
flash -0.3 to -1ev
shuttle 1/100
aperature f4
my set up without video lighting is almost perfect. do try it
wb custom 4800k
flash +0.3 to +1ev
shuttle 1/80
aperature f4
flash was with lightsphere upwards.
try go keep the distance from the stuject around 2.5 to 4 meters will be the best.
Keep on shooting and learning man.
Cheers