Is there a copy of the file saved to the ipad/ipod when using progressive http download (apple segmented) that the user could potentially copy off the device?

meaning, is this scenario considered 'safe' from a content protection pov: 1. user comes to websites with movies behind paywall 2. user selects a movie to watch online (progressively downloaded or 'pseudo-streamed') 3. segments are downloaded seamlessly by html5 video tag as part of .m3u8 4. movie plays/ends.

is there any full copy of this movie on the device that can be transferred off? anyone know apple's stance on this?