If you want to download as videos itself, you can use other free tools like Free Youtube Download to download all videos with a single click. Please be careful while installing this tool as it optionally installs a browser toolbar and modifies search preferences. So please make sure you read and uncheck the optional checkboxes while installing to avoid surprises in your browser.
I'm using YouTube offline feature on my Android device, so that I can playback the offline videos within the YouTube app even there is no internet connection. When I searched for any of the video files, I can't find them on device/SD card memory. Are they encrypting the file so that it can be played only with YouTube app? Does anyone know the specific folder for offline video data?
With this online YouTube channel downloader, you have the ability to download the YouTube channel you want completely free, as long as it’s not copyrighted. This service provides downloads for what it considers ‘educational purposes.’ It does block any kind of content that has copyrighted material in it, which means you’re not going to have quite as many options for what you want to download, but you’re still going to have a lot of interesting things that you can listen to or watch. What’s really great is that it’s simple to use.