If you're on Mac OS Sierra and having problems playing HVC1 HEVC or H.265 codec video on things like Quicktime then instead of upgrading your OS, you can use VLC to easily convert them.
https://www.videolan.org/
Just go to VLC app, file & convert / stream.
Watch video Easy free way to play & convert HEVC HVC1 H.265 video on older Mac OS Sierra online without registration, duration hours minute second in high quality. This video was added by user Reaper, Logic and Music Tech Tutorials 30 April 2020, don't forget to share it with your friends and acquaintances, it has been viewed on our site 18,771 once and liked it 95 people.