From Optflux
If you’d rather do without the headache of downloading a certain facebook video downloader to download your chosen YouTube video, you can use an online tool. Although there are several web-based download platforms for YouTube, GetanyVideo is our current favorite. It’s clean and fast and won’t maybe you have clicking through pages which spawn popups or another intrusive ads.
Step one: Obtain the YouTube video you wish to download and copy its URL from your address bar towards the top of your browser window.
Step 2: Navigate to the GetanyVideo homepage.
Step 3: Paste it into the bar that reads “Enter the video's link...”
Step 4: Select your selected video format and click the respective blue “Download” button for the right-hand side.