TLTR; This answer may help someone
From any bash shell you could use youtube-dl
Edit: yt-dlp is an enhanced fork of youtube-dl and could be a replacement in any script as @barlop mentioned (but it seems to be only downloadable and instailable withand upgradable only from pip - not the system package manager)
youtube-dl installation for Ubuntu
Package manager (apt / yum / ... repo)
sudo apt install youtube-dl
only youtube-dl : this method isn't applicable for yt-dlp
python package (python scriptable) (mostly updated)
# you will need pip installed
sudo apt install python3 python3-pip
# always use latest version or upgrade
# you may use sudo for system-wide installation (not recommended)
# if the instlation is successful and still command-not-found
# - add python's `dist-packages` dir to path on your system
pip install -U youtube-dl
keep in mind: most of time only latest version is the working one
Download one link videos (file/playlist/search)
# replace `mp4` with extention needed
# replace `https://link/to/download` with desired download link
youtube-dl -f mp4 "https://link/to/download"
Download multible files
From file containing links
while IFS= read -r line; do ( youtube-dl "$line" ); done < file.txt
refer to @terdon answer on this question for silent interpreting
From a search link or playlist you could just let youtube-dl download it as files
or refer to this answer of my past question for a more structured download https://stackoverflow.com/a/67144906/9907243