Some notes on the batch file below. This is saved as a .bat file and runs in the middle of the night using task scheduler. I didn't include the error checking portion because it adds a bunch of complexity and dependencies. The batch file below can be copied and pasted in the same batch file for every channel you want to download. Just copy the block below and paste it below and modify it for the next channel. I also keep a copy of yt-dlp.exe in every folder I'm downloading to, and in the batch file, it runs an update of that file to make sure I always have the latest version before downloading. I also download the subtitles in English and I download the thumbnail for the video, so that it shows up nicely in Plex. The first time it runs, it will download all of the videos from the channel, and it will record the urls into a text file for all of the videos. The next time it runs, it will check the videos available from the channel against the list it recorded and only download new content. If you need help, consult the docs on yt-dlp github page. I don't really have time to help with tech support. I should also add that you'll need to replace the http string below with the url of your favorite youtube channel.

    ECHO Checking Your Favorite Channel...
    cd "\path\goes\between\the\quotes"
    .\yt-dlp.exe -U
    .\yt-dlp.exe --download-archive ./playlist.txt -iw -o "%%(title)s-%%(release_date)s.%%(ext)s" -o "thumbnail:%%(title)s\%%(title)s.%%(ext)s" -v https://www.youtube.com/channel/UCpil30eNi37bPLwKp4g4kUA
    cd \
    ECHO Your Favorite Channel updated