We can now tell you that if you want to access all of YouTube's online videos on one computer, it will be difficult - if not impossible - you will need a large hard drive. You can still have all the YouTube videos you like with a program such as Gihosoft TubeGet.
It's a simple downloading client. lets you download any YouTube video by just pasting the URL. It can download videos from YouTube as well as other websites that provide the most Internet streaming video traffic. This is particularly useful for those who are looking for an easy video download client.
You will have to sign up as a paid user to access all the features of the program. Some functions are not available in the free trial version.