Usability 
Revision3 produces and distributes Internet TV shows which are distributed on YouTube, Tivo and Itunes and vis Android and iOS apps. Current shows include Diggnation, Lifehacker, Techno Buffalo and many more (mostly consumer tech and video gaming oriented) shows.
The Revision3 mobile site offers most of of Revision3's content in smartphone friendly format (320x180, H.264/AVC video, MPEG-4 AAC audio). The videos I tried played well on all my test smartphones, including a Nokia N8 and N95, Samsung Wave bada phone, Palm Pixi Plus WebOS device and an HTC Magic Android phone.
Delivery is by progressive HTTP download so videos start to play immediately on platforms (Symbian^3, WebOS, Android and iOS) that support progressive downloads. The Wave and N95 don't and had to download the full video before playback could start. In spite of their relatively low resolution, the videos played in full screen on all the devices. Playback was smooth and free from lag.