Mobile Developmet: Android, iOS & BlackBerry

Good day all experts,

I need some advise :)

We currently have an educational tool for Windows OS only.
Our goal is to port this software to mobile as well. IOW: Android, iPhone & BlackBerry.

Some background about the software.
The software teaches people a language skill. And consists of lots of videos. That is basically the core of the app. It also contains a test, tips and information section.

1. So I would firstly want to get good advise on what would be the best to develop something of this nature in for mobile? Is native apps better? Making more money in terms of mobile? Or would there be more benefit in something like phonegap?

2. What would be the best approach for utilizing the videos on mobile? What is best practice in this regard? Should the app connect to internet and download video on user's demand? What design architecture would you recommend?

Thanks in advance :)
Who is Participating?
girionisConnect With a Mentor Commented:
Why don't you develop your application as a web application? By doing so you can have access to it via any device, mobile or not. If it doesn't need to have access to native components (for instance camera, or microphone) then it would be easier and more convenient and you will reach all devices that have a web browser.
MihalytConnect With a Mentor Commented:
In addition to girionis answer.
The easiest and universal way to develop web application.
But if you want to use native components you can develop hybrid / mixed app. The starter is native app and it reach web contents. In that case you must build the native app part for all platform separately.
Optimise your videos to mobile screen size. Decision to use them online or offline depends on your goal. Oppositions: data size on the device - quality - download without breakthrough - internet bandwith - replay video datatransfer.
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