I'm in the process of putting together a database of resources related to mobile video. After watching this, I had to go ahead and push this particular resource out to you right away as I know many of you have questions that he's giving the answers to. I also know that this guy is one of the top video experts in general (he's literally written the book on a lot of aspects of video) and, as you will find out, he has one of the longer histories of producing video for mobile as well as working with others help them get mobile video going. Be aware that, as he gets to the 40 minute + mark, his presentation focuses on smartphones and iPads and the compression specs he shares are too high for most phones that you will find in the majority world.
So, here's a high recommendation to you- grab a drink, snack, notepad and pen and learn a ton watching this information dense 50 minute video on "Delivering Video to Mobile Audiences".