I was wondering why this longstanding bug has never been fixed? We tried to use use FLV videos on the Android platform but gave up since they cause black screens when you bring come back from an android activity like a in app purchase that uses native UI. The ContainsVideo xml flag that can fix this on some devices but will break a set of another devices. Multiple bugs have been reported on bugbase.adobe.com and they seem to be ignored even though many users are frustrated with the issue. Here are a couple of reports of many:
Bug#3836848 - Android: When StageVideo is being rendered by software, black screen and audio only.
Bug#3578045 - new Video() android black screen
AdChoices