When placing semi-transparent .png files (say, white rectangles with an 80% opacity) as ImageButtons over an ImageView, the buttons appear completely as expected, however if these buttons are displayed over a VideoView that is playing a video, the buttons get tinted significantly darker than they do when over the ImageView.
Interestingly enough, when I try to take a screenshot, the buttons appear normally in the screenshot! So... I cannot include pictures. This does not occur on all phones. It does occur on the Nexus 4 I am currently testing with.