Just copy the URL of an online video and paste it into 4K Video Downloader. It works extremely quickly and doesn't throttle your download, plus it's really easy to get to grips with. We recommend it if you want a no-hassle option that requires close to zero effort on your part. Supported sites: YouTube, Facebook, Vimeo, Flickr, Dailymotion, and several other sites.ĤK Video Downloader is the simplest and most straightforward tool to capture video from a website.