macOS asks for permission when iFlicks needs to control the TV app. If you previously denied that request, adding a processed video to your library may fail.
- Open System Settings on your Mac.
- Go to Privacy & Security → Automation.
- Find iFlicks and enable its permission to control the TV app.
- Return to iFlicks and try adding the video again.
On older macOS versions, the corresponding controls are in System Preferences → Security & Privacy → Privacy → Automation.
Also check that adding the result to the TV app is enabled for the video and that no rule disables it. If the conversion finished successfully, confirm that the output file exists; an import failure does not necessarily mean the conversion failed.
If iFlicks is not listed, try the add-to-TV action again and note any permission prompt or error for your support request.