Sorry if it's posted before or not, I read an article on gsmarena's blog and wanted to share it with you http://blog.gsmarena.com/iphone-4-now-plays-1080p-videos-easily-does-some-xviddivx-magic-too/ "The best part about Filer is that it supports the iTunes file sharing service. This means you can simply dragndrop any file from any computer (with installed iTunes) straight to the iPhone4, no syncing needed. Besides being a document and photo viewer, a nice file manager, etc., Filer also offers playing videos right within its user interface. While I poked around its video playback prowess a set of various mp4/mov files, I was surprised to see that it played fine some videos that iTunes didnt want to accept and sync with my device. They played perfectly fine with Filer without any lag, glitches or dropped frames. And some of those, were FullHD. It seems iPhone 4 is capable of playing full HD videos without any tuning, you just need the right app. Ive also tested this on an iPad, and guess what it worked like a charm as well." I tested a 1080p movie trailer on my iPad and it played perfectly.