I know that when I'm looking into a new piece of software, I see a blog that hasn't been updated in a few years and wonder, "Does it still work?"
I'm updating this just to let people know that VidSync is still working just fine, as of macOS version 10.15.1 (Catalina) in mid 2020, and there's nothing on the horizon to suggest that will change. I am still checking it with each new OS version, and if something breaks I'll be quick to fix it.
There haven't been any updates to the program in four years because nothing has broken that would require an urgent update. I have collected a list of minor new feature requests and improvements to be made at some point, but I'm not sure how soon that will happen.
I am still happy to hear about projects for which you're using VidSync (or might plan to use it), and to answer any questions potential or current users might have about the program.