Step 1. Go to hd21.com and find the video you'd llike to download. Then copy the video URL from the address bar.
Step 2. Visit DoVideo Online Video Downloader and paste the video URL into the address column, and then click the Download button.
Step 3. Now you'll see the detailed download list. Select the video file you want to download, and right-click the Download button and choose Save Video As (If you're using Firefox or IE, you can click the Download button to download this video file directly)
Step 1. Go to hd21.com and find the video you'd like to download. Then copy the video URL from the address bar.
Step 2. Start iTube HD Video Downloader and click the Paste URL button, and the program will detect the video URL directly, then display the resolution of this video for download.
Step 3. Select the video resolution you need, and click the Download button at the bottom of the pop-up window to start downloading video from hd21.com.
Step 1. Start iTube HD Video Downloader, and go to Settings > Preferences > Extension, and click the Install button beside the browser you'd like to download videos from.
Step 2. After installing iTube HD Video Downloader Extension, you can go to hd21.com and look for the video you want to download. Then you'll see the Download button at the Download button under the video screen.
Step 3. Click the Download button and iTube HD Video Downloader will start downloading videos from hd21.com immediately.
DoVideo is an easy-to-use online video downloader website, and it allows you to download videos from YouTube, Facebook, Instagram and more video sharing sites. DoVideo is developing and trying to support for all video sharing sites. DoVideo Online Video Downloader enables you to get the best video downloading experience.