I believe I ran into a similar problem... something to do with the display list and stagevideo. When using stagevideo the video is rendered behind the display list and the spark skin includes a black rect background in the displaylist which ends up covering the video. From memory you can either ensure nothing appears above the video on the displaylist, create a new skin with no bg, or simply disable omsf.useStageVideo.
Sorry I'm just going by memory here as I'm just on my phone atm, but hopefully it helps somewhat. Hi all, all of a sudden today all videos (over here at Dedoose.com) are no longer playing back in Chrome's PepFlashPlayer. Our videos are all multi-bitrate F4M videos. I've been trying various FlexSDK versions and well as various OSMF versions and no luck. Video acts like it's playing, audio is playing back, but no video image is output. Everytime I try to debug our app with the pepflashplayer debug version, the player crashes instantly, so I haven't been able to see what to do here. This is about the 10th time that Google has updated pepflashplayer silently breaking a feature our app uses. I'm not quite sure where to turn for help here, and thus reaching out to you all. I hate to just spam a message to chrome users in general asking them not to use chrome, but it's almost at that point. ~ JT