I've built a web app that uses the HTML5 tag and JavaScript code that renders other content synchronized with the running video. It works great in desktop browsers: Firefox, Chrome, and Safari. On an iPhone or a DroidX, the native video player pops up and takes over the screen, thus obscuring the other dynamic content that I want to display simultaneously with the video.
Is there any way around this? If necessary, I'll figure out how to write native apps for both those platforms, but it would save me a ton of effort if I could just stick with HTML5/JavaScript.