Xilisoft YouTube HD Video Downloader is a commercial video downloader. It can be used to download video files from YouTube.com and save them on your computer. As its name suggests, the application can be used to download HD (High definition) videos as well, but other YouTube downloaders from Xilisoft that I have tried also let you do that, so look around before buying.
The app is basically a web browser. You use it to browse YouTube.com and find the videos that you want to download. When you have found one, you can add it to your download queue by clicking on the "Download" button. If you want to download the HD version, you have to select the 720p or 1080p quality setting from the YouTube video drop-down menu, just as you would on a regular web browser.
In my testing of this app, I downloaded several videos. Some of them were SD videos and some of them were HD. All the files that I downloaded looked identical to the YouTube videos, and they played well on VLC.
In terms of speed, I can't really say whether downloads are accelerated or not. They didn't use my full download speed, but neither did YouTube.com.
- It works well
- Nice interface