Video has to be edited at 48kHz (there are a couple of pull-up/down rates for specialist
things but they can be ignored here). 44.1 isn't acceptable... But you know all that. Film
is also done entirely at 48k. None of the audiophoolery 192 nonsense!
Word length is more variable. All systems can use 16 bit. Many will do 20, and a lot
will do 24. Pretty much all the current software based editors will handle 24 bit, but
some older broadcast infrastructures restrict to 20 bit.
Fim distribution and
DVD/blu ray etc generally do 24 bit, but this is mangled through data reduction (dts, ac3
Technical Editor, Sound On Sound