Are there any video players for Android that allow you to fast forward at multiples of 2x, 4x, 8x, 16x and 32x?
There is a player called MX Player. It is widely used having useful features and various supported file formats. I recommend you install it on your phone through the Google play website.
Google Play website: https://play.google.com/store/apps/details?id=com.mxtech.videoplayer.ad