A video has appeared on YouTube that appears to show HTC’s customized UI for Microsoft’s upcoming mobile OS.

Windows Phone Series 7, now Windows Phone 7, now coming to be known as WP7 is due to hit the streets in the near future, and this video appears to show a WP7 phone with several new apps and UI touches.

The apps include 3D notes that fly off the screen and a cute “love me, love me not” animated app.

The video, first spotted by mobilitydigest.com, is not official, but features the words ‘HTC confidential’ at the bottom, and one tile on the home screen of the phone shows the HTC Portal.