The following I will explain you how to download online Youtube videos with Online Video Downloader for Youtube in detail. Be sure everting is ready!
Step 1. Launch Online Youtube Video Downloader
Launch the Online Youtube Video Downloader on your computer, a register window will pop up if you havn't registered. You can click the "Buy Now" button to get a registeration code right away, it will cost you some dollars. Or you can also click the "Free Trial" button directly to experience its wonderful functions for several days firstly. Next let's familiar with its interface:

Step 2. Specify URLs
Click the "Download Online Video" icon directly up to the main window, then add the Youtube video download URL. Adding URLs continuously are allowed.

Step 3. Download online Youtube videos
Click "Download" button and start the progress of downloading online Yutube videos. By the way, You are allowed to convert the downloaded videos to any formats for enjoyment on portable devices or applications like iPad, iPhone 4, iPod touch 4, Windows Phone 7 etc.
OK, that's the guide on how to save videos from YouTube above. Now, click the following "Free Download Now" icon to download Online Youtube Video Downloader for free, just have a try!
