I think that it was the Logitech C920, which is still available.

But like I have said, I do not think that the model mattered much. IIRC the camera had an internal video encoder, because otherwise uncompressed FullHD video would not pass through USB 2.0.

The differences between FreeBSD and Linux at that time were at 2 levels. Regarding the user interface, FreeBSD happened to include in the base system programs dedicated for using such a camera, so their use was very simple. On Linux I had to search and install a suitable package, and those that were available were more general video applications and because of that their configuration to do the specific thing that I needed was more complex.

Besides the simpler interface, there was the stuttering problem on Linux, which was caused by the scheduling policies of the kernel. Perhaps it would have been possible on Linux to find a way to ensure a higher priority for the video and audio handling, to not be preempted by the concurrent programs running on the server, but since on FreeBSD everything worked fine out of the box there was no reason for me to investigate how that could be done on Linux.