Could some kFreeBSD fan please have a look at this: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=612438 AFAIUI, the issue is that libva is unconditionally trying to build a v4l module. It would require someone to hack up the build system to stop doing so on kFreeBSD. Probably not that much work, but I'm too busy with other stuff right now.
Proposed patch is in #612480. Petr