I need to embed an MP4 video inside my mobile application and have it play reliably every time the screen is opened. The clip is already encoded as MP4; the task is to wire it into the app so it streams or loads locally without stutter, black frames, or audio-sync issues on both iOS and Android. What I expect from you: • Source code or a lightweight demo project that drops straight into my existing build and automatically picks up the MP4 I supply (local file or remote URL). • Clear, commented instructions on any native modules, SDK settings, or third-party libraries you introduce so I can reproduce the setup on fresh installs. • A quick note on any platform-specific nuances you address—buffering tweaks, permission calls, or fallback handling—so I understand what’s happening under the hood. As soon as I can open the screen in my app, hit run, and watch the MP4 play smoothly on real devices, the job is done.