Hmmm, i'm not sure, Chemmy. In case it helps, here are my settings:
Maybe the program you're using to convert the file after capturing is speeding it up?
Also, last night someone asked about the addons in the Ragnaros video, and i forgot to mention a couple of them. The visible ones are:
CT_RaidAssist
CT_MasterMod
CT_UnitFrames
Scrolling Combat Text
Sorren's Hunter Timers
RangeHelp
CooldownCount
Oh, and i survived those lava baths because of some amazingly well-timed healing by Kytae and Molox... big thanks!!
Also some luck with cooldowns on banages, health potions, and whipper roots, plus 205 fire-resistance helped!