Flash 9.0 on 64-bit Ubuntu with Firefox 2.0

I'm watching the Mac vs. PC ads on Youtube, in the 64-bit Firefox 2.0 browser. This shouldn't be working, Adobe does not have an official 64-bit Flash player for any operating system, let alone Linux. You ask how? Here's the trick:

1. Get nspluginwrapper sources from the Debian website.
2. Compile and install.
3. Get the Flash 9.0 player from Adobe.
4. Untar, and copy libflashplayer.so and flashplayer.xpt to ~/.mozilla/plugins/
5. Run nspluginwrapper -i ~/.mozilla/plugins/libflashplayer.so
6. Enjoy!

I've done this before, with an older version of nspluginwrapper, but could never get sound working. Maybe the fact that I used RPMs (converted by alien) messed things up. Even now, however, nspluginwrapper segfaults. Thankfully it works for nspluginwrapper -i, which is all I that's required.

As an aside, swfdec is a free software Flash viewer that plays Flash videos, and so is gnash.

Furthermore, youtube-dl allows you to download the flash videos to your hard disk, where mplayer or ffplay (better) can play them.