This issue should be tested both in Android and iOS. In web as teacher, add a video without a poster in a label or in a section description. There is one in master site > MM Dev Testing > Resource: Page (section description). In web as teacher, create a page and add at least 1 video without a poster. There is one in master site > MM Dev Testing > Resource: Page > Different videos. In the app, login in the site. If the site was already stored in the device, go to More > Site preferences and delete the storage. Go to the video created in point 1. Check that, before playing the video, you can see the first frame of the video as a "placeholder". Before this patch, in Android you could see an ugly placeholder, and in iOS there was no placeholder, just a transparent background. Open the page created in point 2. Check that, before playing the video, you can see the first frame of the video as a "placeholder". If you're using the "Different videos" page, please notice that the 3rd video has a poster, you should check the first 2.