From Optflux
If you’d rather do without the problem of downloading a selected youtube downloader to download your favorite YouTube video, it's possible to readily online tool. Though there are several web-based download platforms for YouTube, GetanyVideo is our current favorite. It’s clean and fast and won’t have you ever clicking through pages which spawn popups and other intrusive ads.
Step 1: Find the YouTube video you need to download and replica its URL from the address bar at the top of your browser window.
Step 2: Navigate to the GetanyVideo website.
Step 3: Paste it to the bar that reads “Enter the video's link...”
Step 4: Select your selected video format and click the respective blue “Download” button about the right-hand side.