download like iam in microsoft world(internet download manager in windows - linux)
 

i had switch over from windows to linux. In windows they have idm and other download manager and typically when i want to download a video in windows ill just have to click idm and start download.

what are the download manager that i can used in centos6. where would i find them. i want to download videos easily especially on youtube

For Youtube videos just use a browser extension, I use DownloadHelper in my Firefox, but there are many of them for the different browsers.
For download managers, I use JDownloader (needs Java), it can also download videos (and many other stuff) using the FlashGot extension.