2010/6/7 Rony gnulinuxist@gmail.com:
Crome does not support Firefox plugins and does not have any plugin to download (and convert) YouTube and other videos into the machine.
Use gnash, it allows saving videos. Right click, Edit -> Preferences -> Media -> Save media streams to disk. Also Adobe plugin saves youtube videos in /tmp which should be the case for chrome as well.
You might want to check the latest snapshots as a bug that prevented playing youtube videos is fixed recently. There are prebuilt rpms and debs available from http://getgnash.org/packages/
If you have 64 bit OS get it from http://j4v4m4n.in/gnash-snapshots/ (compiled on debian sid)