The Office 365 Video Portal is a specialized portal experience for serving videos. It takes any video that you upload to it and encodes it via Azure Media Services so that it is easily accessible on any device whether it’s a corporate laptop on your main network or an IPhone on a shaky connection.
Microsoft has now just released the Office 365 Video IPhone App. It logs you into your Office 365 account and then displays the latest videos through a native client.
I just tried it and the video playback is excellent! You can also upload videos directly from your IPhone to your Video portal.