Warning: Downloading videos may violate YouTube’s Terms of Service and copyright law if you don’t have permission from the rights holder. Use this script only for videos you own or that are explicitly licensed for download.
from your browser using an extension like "Get cookies.txt LOCALLY"). Legal Reminder: youtube playlist free downloader python script
The good:
If you need 1080p/4K video or just want to extract MP3 audio, pytube handles that too. YouTube playlist free downloader — Python script Warning: