MiTube?

Searching is key.

https://forums.macrumors.com/threads/985395/

Still works for me

Alchematron said:

Anyone using it?

Developer said Apple is taking it down shortly.

http://appshopper.com/blog/2010/08/04/mitube-lets-you-download-youtube-videos

Click to expand...

thats late news, Apple has already taken down Mitube from the appstore late yesterday.

that means its not available anymore through the appstore, but the dev has already posted it on the cydia store for free.

those who had downloaded prior to the appstore take down can still taste the forbidden fruit!