Using the app is as simple as browsing with your favorite web browser (Chrome, Mozilla Firefox, Opera...) and, when opening a video to view it, selecting HD Video Downloader instead of your browser or installed media player.
This way, the video that you've selected will be added to the download queue within the app, and in just a few seconds you'll have it available on your device, available for you to watch even when you don't have an Internet connection.
HD Video Download is an excellent video downloading tool. Although it may not be quite at the same level as the famous TubeMate, it still has some excellent features.
Requires Android 2.2 or higher.