4K Video Downloader

I've recently started using the program 4K Video Downloader to download videos from sites, such as youtube to watch whenever internet is not available. I've used other video downloaders before. However, this one is by far the best. It supports several different sites and is fast. I would highly recommend this to anymore.  https://www.4kdownload.com/products/product-videodownloader?r=free_license