HTML5 Intro

If have a video intro in a variety of formats including those for iPhone/iPad and Flash formats are f4v, flv and m4v. I need an HTML/Javascript file that will display the intro video in the best format from the videos that I have. Please ask lots of questions if there is any gap in the requirements. Requirements for playback - auto play from the URL "[login to view URL]" - must always maintain 16:9 aspect ratio with auto resize in browser window - either automatic re-direct to a seprate home page ([login to view URL]) or "click to enter" dialogue - if performance is an issue with hosting the asset on a web server consider using a streaming server and I will upload to a 3'rd part service - at no time should there be a black or blank page even during re-direct - The seperate home page ([login to view URL]) should be loading to the browser cache in the background while the video stream is playing