Hi Jermaine,
Could you send us a feedback report from within the app? Choose the application menu "Kyno" - "Send Kyno Feedback..." and press "Send Feedback". This will send us your log files and hopefully contain information about the problem. We'll respond to the ticket there.
Best, Thomas
Jermaine Reid
as the title says hevc isn't working on m1 Macs, when I convert something I just end up with an audio file!