IMDB - I have the same experience.
if you're looking only for the floating video functionality, try this: https://play.google.com/store/apps/details?id=gpc.myweb.hinet.net.PopupVideo. it's a great app! runs smoothAlso, the only other app I've had trouble with is Mobo Player https://play.google.com/store/apps/details?id=com.clov4r.android.nil that crashes when trying to return to home screen and play video in a floating window.