Migration from 0.2.x to 0.3.x Setting MIME type of video source Only if you using play method with second parameter: Replace webOSVideo.play(url, startTime); to webOSVideo.setMimeType(mimeType); webOSVideo.play(url, startTime); Notes: mimeType must be correct for playing stream. Removed Device#processBackKey Use showAppsManager() in Application#_backOnEmptyHistory()