From my understanding, the P8P’s video boost can’t be done in the phone itself, but it’s actually uploading the video to Google’s servers, processing it there, then downloading the finished product back again. In fact, it probably uploads two videos, one at high ISO and one at low ISO to get the full HDR range.
For anyone who wants to take lots of videos, this sounds like it’ll blow through your data caps very quickly.
It probably does it after its backed up via Google photos which can be set to WiFi only.
We’ll have to wait for the first reviews of that feature but this seems to be the most likely way they’re going to go about it.
That sucks, because then you won’t be able to see if you need to re-shoot a video until after going home.