We have a page at Youtube Downloader to download nursery rhymes from Youtube. However, it doesn't work well when the video file size is big, i.e. bigger than 10 Megabytes. So we come with this page for advanced downloading.
From this page, you can download any Youtube video up to 20 Gigabytes. But before you start downloading, please remember:

1. After you download the video, you can rename and save it anywhere you want, such as myfavoritevideo1.flv or myfavoritevideo1.mp4
2. To play the downloaded videos, you may still need to install the Windows Media player codec (Caution updated on 1/31/2015: people report malware in review after installing Windows Media player codec. Stay away unless you can make sure to customize the setup correctly. So sad to see another good piece of software has decided to turn bad. We leave this link here and hope more of kibase.com users get aware of this.), or a flash video player.
3. You need to have the HTML source of the Youtube video web page to start downloading, for example, the HTML code for this sample video at http://www.youtube.com/watch?v=WEjrle_bl6U.
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Step 1 - Open the web page of your Youtube video in the browser
Step 2 -
Step 3 - Click the Submit button or press Ctrl+Enter key to start downloading.
Option - Start downloading the video file automatically when it is ready.