From Optflux
If you’d rather do without the hassle of downloading a certain youtube downloader to download your favorite YouTube video, you could work with an online tool. Nevertheless, there are several web-based download platforms for YouTube, GetanyVideo is our current favorite. It’s and also fast and won’t have you clicking through pages which spawn popups and other intrusive ads.
1: Discover the YouTube video you would like to download and copy its URL in the address bar on top of your browser window.
Step 2: Go to the GetanyVideo website.
Step 3: Paste it into the bar that reads “Enter the video's link...”
Step 4: Select your preferred video format and click the respective blue “Download” button for the right-hand side.