Files can be transferred very quickly to a playback device via USB or USB OTG. (Via WiFi, it works if need be, but is simply extremely slow.)
With Full-HD videos, the file size is about 90MB per minute!
-> For me 5 stars, because the best price / performance ratio!
Notes:
For proper playback of videos on Android devices the "MX-Player" is very appropriate.
A comprehensive instruction manual to the camera can be found (via eg Google) under way, "WDV5000_Anleitung DE"