It says 'some' and not 'all'. I wonder what the difference is. Everyone at my office and on my FB page can see it, but some here cannot. I suppose it depends on the device, but PCs seem to be ok.
After some research it appears that YouTube will display the video on any device that will display an ad. One exception is the YouTube client on iPhones/iPads. They will display the content regardless. Seems Roku & similar are at issue and some Android OS versions.