Unlike other methods to view youtube videos on your windows mobile phone, this method does not involve a video player, nor a downloader. This is a browser that is able to display flash player 7,8, and 9 contents on any website including youtube.
With this browser you can really browse youtube, login, leave comments, vote, as if you were on a real computer.
Other than youtube, this browser is capable of displaying any flash or java based website, including chat, online gaming, etc.
This browser is called Skyfire and it is completely free!
the touch screen version offers a very smart controllability, double click to zoom, hold to right click, and drag to scroll. it kinda reminds me of the iphone.
The downside of this browser is a relatively slow rendering compared to Opera (it will take some seconds before the page is correctly rendered after a zoom). video playback is relatively slow, it can’t do tab browsing and there is not much options to configure.
There is also a version for symbian phones but I didn’t test it