I watched the video, and I have not yet experienced that. Does it export like that too?
If it is only playback, I wonder if you are affected by this change in the release notes:
- Fixed another very old bug on Windows where sound does not follow the default output device, for example plugging headphones, until you restart the app. Please note that if you are using Settings > Audio Channels > 6 (5.1) after the default sound output changes, you will likely experience distortion in the audio playback until you restart the app.
But also see the next note:
- Added the
--SDL_AUDIODRIVERcommand line option for Windows and Linux.
To fix the problem, Shotcut changed the default Windows audio driver for stereo (Settings > Audio Channels) from directsound to winmm. It is possible that you have a system-wide environment variable SDL_AUDIODRIVER set that changes this, or it behaves different on your system. But the second note lets you change it on the command line, for example:
--SDL_AUDIODRVER wasapi
To do that in Windows, you can either run shotcut.exe from cmd, or change the app icon properties: right-click the app icon, choose Properties, and add the above text after shotcut.exe in the Target field. Values to try are:
wasapidirectsoundwinmm
For example
C:\Program Files\Shotcut\shotcut.exe --SDL_AUDIODRIVER wasapi