[Android]Downloading a youtube video

I am trying to Download a Video as explained in:

Can’t download youtube video and How does a YouTube movie downloader work? - YouTube

but it seems this method does not work anymore.

How can I download the .flv from Youtube today? Is there a method to save the movie after I watched it, without downloading again? Does anybody have a working exmaple? (Is the best way to learn)

Thanks in advance, Adrian.

Userscripts.org has some scripts that enable downloading and viewing without flash. I haven't tried it, but OilCan is supposed to run Greasemonkey scripts on Android.