From Hector Ramos:
Your buddy just sent you a link to a YouTube video, but you are at work where the website is blocked. What do you do?
You have an iPhone which can watch YouTube videos! But wait, how do you launch that specific video your buddy sent? Easy!
Open up YouTool and type in the YouTube Video Code found at the end of all YouTube URLs. YouTool will launch the native iPhone YouTube app and you will be watching your YouTube video in seconds!
A YouTube video can be uniquely identified by it's Video Code found in any YouTube URL. For example, the EyeTour video guide for Old San Juan, Puerto Rico can normally be found at http://www.youtube.com/watch?v=Ui-9x3bkeU4
In order to watch this video quickly on your iPhone or iPod Touch, you could launch YouTool and input the Video Code, found after the v= tag: Ui-9x3bkeU4
-Video IDs are now verified against YouTube before launching a video This should help any one who was having issues with confusing lowercase and uppercase letters combined with numbers. If the Video ID is not found in YouTube, you will get an alert and a chance to make any corrections as necessary.
-Video History Now you can browse through all the videos you have launched using YouTool.
-Other stuff Such as an about view and the ability to send feedback directly through YouTool.