As described in The PDF images lose the transparent background in PREZI Next Desktop the mobile viewer shows this failure, too.
Moreover, there is an error message if the presentation contains a video. You can scroll through the presentation, the message remains, the video will not play.
Prezi Desktop 22.214.171.124
Prezi Viewer for Android 4.0.3 or higher (https://play.google.com/store/apps/details?id=com.prezi.android), versions 2.1.2-9999 and 2.3.2-10507 (actual)
Sony XPeria L with Android 4.2.2