Try Infinity Reader from Google Play https://play.google.com/store/apps/details?id=com.imeonsoft.infinity The reader supports audio, video, scripts and all EPUB3 features. The reader comes with a free book, which contains youtube video. You can download a lot of free books from the reader.
eReader Prestigio: Book Reader is the best app so far: https://play.google.com/store/apps/details?id=com.prestigio.ereader , if you can't get from Play Store, download apk: http://choilieng.com/apk-on-pc/com.prestigio.ereader.apk I even installed it on my Kindle