Our friend and founder of 1800pocketpc site, XDA member the0ne, prepared a great video tutorial about the Youtube Fix for Windows Phone 7. On this case, he tested on a Omnia 7 but may work on other devices…
On this video, we can see how the plug in works, fixing the broken pictures, or videos on your browser making them to appear correctly. No doubt a great fix for the young Windows Phone 7. Original poster also mentions that you must make sure to have the stock Youtube App installed on your WP7 device.
Originally posted by the0ne
The region fix works VIDEO TUTORIAL : Youtube Fix for Windows Phone 7
Before and after
You can find more information in the original post._________