Hi Mark,
I did not try any other browsers, only Chrome. The computer was a Windows 10 operating Chrome, sorry I don’t have the versions handy. The mobile device was a Samsung Galaxy S5 SM-G900V operating Android 6.0.1. Chrome on the mobile device is version 67.0.3396.87 and as a reminder everything is working fine when “Request Desktop Site” is checked but will not play video when it is unchecked.
Thanks!