Hello WYPTT1,
Welcome to Apple Support Communities!
We want to resolve the issue so you can watch movies via the adapter and your iPhone again.
Let's make sure you're using these steps to connect to your TV:
"Connect iPhone to a display with a cable
With the appropriate cable or adapter, you can connect your iPhone to a secondary display, like a computer monitor, TV, or projector.
- Plug a Lightning Digital AV Adapter or Lightning to VGA Adapter into the charging port on the bottom of iPhone.
- Connect an HDMI or VGA cable to the adapter.
- Connect the other end of the HDMI or VGA cable to the monitor, TV, or projector.
- If necessary, switch to the correct video source on the monitor, TV, or projector. If you need help, use the display’s manual."
Make sure the TV is set to the correct input as well. Test with another adapter if needed and restart all devices.
We hope this helps isolate and resolve the issue so you can connect your TV and iPhone without issue again.
Cheers!