Here is the 1.28.2.15 viewer
https://cattencarter.com/CoolVLViewer1.28.2.15.zipMD5(CoolVLViewer1.28.2.15.zip)= 95b6171d5cef2c9aadd94fb820f71bd8
SHA1(CoolVLViewer1.28.2.15.zip)= 4e3755e1f0dee8585843357da2563af426c6af65
You will need to install the gstreamer package to play movies.
You can get it from here:
https://gstreamer.freedesktop.org/data/pkg/osx/1.16.1/gstreamer-1.0-1.16.1-x86_64.pkg