path

Hi. I'm using Linux. I navigate to the directory where the command is, and I call it. I get the "Command not found error". If I export its path, I can call the command with no problems. ¿Why doesn't it work if I'm located in the exact directory? Thanks!

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...