I am in the process of preparing the import of code which makes v4l devices usable in the linuxulator. Basically this means you can use your webcam in skype (tested by the submitter of the patch on amd64).
This is not a “apply patch and commit” thing, because the original videodev.h (with some modifications) is used. I was seeking the OK from core@ for this. As there is no license in the header, and the original author (Alan Cox, the linux one, not our FreeBSD one) gave permissions to use it, core@ is OK with the import.
I intent to do a vendor import of the linux header (prepared today, together with some readme which explains where it comes from and some stuff to show that we are on the safe side regarding legal stuff), and then I want to copy this over to the linuxulator as linux_videodev.h and commit the patch (probably a little bit modified in a few places). My plan is to commit it this week. People which already want to play around with it now can have a look at the emulation mailinglist, a link to the patch is posted there.
With the header being in a vendor branch, interested people could then start to submit new BSD licensed drivers or modify existing drivers which make use of the v4l interface, but I let the import of the header into the FreeBSD include directory up to the person which wants to commit the first native FreeBSD-v4l support.
When such native FreeBSD-v4l support is committed, the linuxulator code needs to be revised.