Yesterday we brought you some in depth information of what will be coming in the Windows Phone 7.8 update, expected to appear in China in a few weeks (presumably with the launch of the Nokia Lumia 510). New features such as a revamped Tile design, new Tile sizes and dynamic Lockscreen wallpaper (Bing) were revealed including the current build number.

Now a new video, presumably from Winp.cn, shows the current build of Windows Phone 7.8 (8858) in action. Actually, it’s less action and more of a nice, soothing stroll on some of the more superficial changes coming in the OS update. The new tiles are shown off and we even see the Bing lockscreen wallpaper working (we’re hoping that third-party apps can take advantage of it too like in Windows Phone 8).