dv works well- and you cant get it wrong - as it only works one way-
my testing shows that dv files are 50% faster than photojpeg at the same size.
The graph below - from a 2.6Ghz Intel with x1900 video card using MTRON 32GB SSD disc - shows the performance of more than 80 different codecs.
DV- is the fastest - meaning that layers playback better, and you can play more of them at the same time.
The performance changes a lot with different image sizes, different codecs, and different codec settings.
there are no codecs you cannot use, but there is a huge performance difference between codecs.
Sure you can do 100% photojpeg if you want - but you only get 1 layer.