At 06:30 in the video: "No one knew at that point how the Unix wars would shake out -- Spoiler alert, BSD ended up winning"
BSD won the Unix wars? what?
There were no winners. Unix remained fragmented and Microsoft stepped up.
Are there any commercial Unices left? No => BSD won.
IBM is still making and selling AIX, it’s pretty popular in manufacturing environments.
I have heard of people running Macosix...
I would interpret it more as a sort of dialectical relationship. The two ultimately ended up adopting a lot of each other, and modern UNIX and UNIX-like systems tend to contain a synthesis of features and ideas from both camps. Most of them mix use of /usr/bin & /usr/sbin with /bin, most have adopted init systems similar to Solaris's SMF over either SysV or BSD style init, etc. I think this has especially been the case post-fragmentation: with no central authority the best of both worlds can rise to the top more easily.