Why does YouTube not allow you to download videos?
Note: If you don't have YouTube Premium or if downloading isn't available to you, the download button will be unavailable and grayed out on made for kids videos. If your YouTube Premium membership ends, you will no longer have access to your downloaded videos.
Why some videos are not downloadable?
Some paid YouTube videos are not for download due to copyright issues. The video URL is not recognized or wrong. You are not using the latest version of the YouTube video downloader. Some anti-virus software considers the YouTube downloader as malware.