Error while compiling my first c++ program

I am a beginner and I am trying to compile my first c++ program. I have installed mingw and added it to the environmen variable. I am using windows 10 and the compiler is installed successfully. when i try to run the program in visual studio code it throws the following error.

PS C:\Users\lenovo\Documents\C++> g++ youtube.cpp
g++.exe: error: youtube.cpp: No such file or directory
g++.exe: fatal error: no input files
compilation terminated.