youtube-dl

I am trying to install "youtube-dl" and this warning is shown in my command line: WARNING: The script youtube-dl is installed in '/home/linuxmint/.local/bin' which is not on PATH. Consider adding this directory to PATH or, if you prefer to suppress this warning, use --no-warn-script-location...

I was trying to download some videos just now, but every time I do so, I get an error message saying "/usr/bin/env: ‘python’: No such file or directory". I have YouTube-DL installed on Mint 20.1 (which ironically worked perfectly when I was still using 19.3), so I don't know what the problem is...