I am facing an issue with the HTML5 videos and Youtube black screen issues only on Android, it is working fine when video is running on Fullscreen but has the black screen with audio playing fine when running in normal mode. This issue even persists with Youtube embed videos.
We have also tested it on Android mobile browser (Chrome) and it running fine but not working in native webview.
Using Corona SDK (ver. 2018.3326)
HTML 5 video: <iframe id="video-container" width="100%" height="100%" frameborder="0" src="videos/<videopage>.html" allow="" allowfullscreen></iframe>