For years I used yt-dlp which is a “feature-rich command-line audio/video downloader” and most importantly, can download YouTube videos. But yeah, it is a command line utility, easy to use for simple things but sometimes a GUI is nice too.
Enter MeTube, which is a self-hosted YouTube downloader. I’ve got it installed on one of the servers in my house and whatever computer I am using I can just load up the local instance of MeTube, drop in a video’s URL and download away!
It can even do full playlists, convert to other formats (like, audio for instance) and I just find it super handy. Especially since it’ll put all the downloads directly on my server so I can access them from any computer in the house. I can also move them into my Jellyfin server from there, so the videos are available on my TVs.