THE SMART TRICK OF REDDIT SAFE YOUTUBE VIDEO DOWNLOADER THAT NO ONE IS DISCUSSING

This is a really simple script that may be even simpler. It initially imports YouTube from pytube and sys (needed for handling command-line arguments). It creates a blank variable named videoURL and, if there's an argument given at the command line, it checks to see if that URL is made up of youtube.com.  A browser extension can save you a step.