Here is the 1.28.0.11 and 1.28.1.1 experimental 64 bit viewer
http://cattencarter.com/CoolVLViewer1.28.0.11.zipMD5(CoolVLViewer1.28.0.11.zip)= a0243eda551405e04938720dc12e1161
SHA1(CoolVLViewer1.28.0.11.zip)= 5fb4765f2f99e94176b7ddf632744d4a9abeb6cd
http://cattencarter.com/CoolVLViewer1.28.1.1.zipMD5(CoolVLViewer1.28.1.1.zip)= 5c48c5d22c5fb3bb1a0b2f813f40de77
SHA1(CoolVLViewer1.28.1.1.zip)= b8c22f346b194a162fd00a1f4eb24db5b3bdae94
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