A little while ago I wrote about how to use VLC to watch YouTube
and get a nice performance boost over watching via the Flash Plugin.
Here is another option for those of you who didn't get VLC working with YouTube, or even those who did. Try Minitube
. A dedicated application for browsing and viewing YouTube. It seems to have decent performance (it uses GSteamer to play videos, whether they have a HTML5 video version available or not) and a nice and simple interface. So if you only had Flash installed to watch YouTube (as I have heard many users claim), here is another solution for you.
I should point out that I'd prefer not have a dedicated application with a totally different interface for every single web site or service out there. Indeed much of the benefit of a browser is that it provides a nice standards based way to access services and a powerful set of tools to manage them. A far better way to provide an alternative interface is via an extension or UserJS. It would also almost certainly be a lot easier to develop as well.
That said, when choosing between Flash and this clever little app, some might find this preferable, at least until more HTML5 Video content is made available on YouTube (come on Google, we're all waiting!). So I thought I would share it with you nonetheless.