Hi ,
I am trying to program ESP32-Cam by Arduino UNO but unforsionatlay it was not working.
This error message displayed to me while trying uploading the code : esptool.py v3.3 Serial port COM3 Connecting......................................
No, you need to connect GPIO0 to GND and then press the reset button on the ESP32CAM.
If you open up the Arduino IDE Serial monitor (before you press the reset button) you should see a 'Waiting for Download' message when you press the reset button.