Using WP 8.1 on a Lumia 1520. I've using the desktop version of Bing to earn rewards points since the started the program. While Bing has had various video wallpapers, they all were stop motion animation on my windows phone. That's being kind because some videos never played. Today I went to Bing.com and was blown away. I looked away as the page loaded up. I looked down and this video of a panda was playing so smooth and clear, I thought loaded a video on my phone instead. Wow! I know the music app is... you know, but MS is working their butts off on Bing.