Android webview html5 video autoplay not working on android 4.0.3

Question

I have developed an application where the user can set videos on a web page: - They can specify a Youtube URL OR - They can upload a video

Depending on which option

Answer 1

[upgraded to answer per request]

Autoplay on most mobile platforms (Android, iOS) gets blocked to avoid poor user experiences - video should only play following a user action. You can usually work around it by triggering the play() on another event (eg the onloaded event)