Sadly, I haven't really seen any threads when I looked for any good solutions for video conferencing software in general for FreeBSD. The most that I've only seen is only use the web version. It doesn't help a lot of the software are designed to use electron (luckily Zoom is sounding like it doesn't); even then devs have zero interest of even touching FreeBSD; even with a 10 foot pole. Some research in the general issue, it seems to be primarily an issue of how FreeBSD libraries are made; that you have to make them on an actual FreeBSD machine where as Linux and other OS's you can simply just target that OS and make a compatible library without even being on that OS. The other side that doesn't help, is the Linux Compatibility Layer is similar to wine (though not as a separate program), mostly in a sense that it can very well be a hit or miss on what instructions was implemented, may in the end be the biggest issue.
As far as the Linux stuff, chroot doesn't really work with linux. The main thing is that the FreeBSD kernel is different to the Linux one, and chroot still uses the base system to work. You could try grabbing an rpm or debian package and getting the library from that. In general, it doesn't matter how you acquire the linux library; just that you get one from somewhere.