I was in China last week and picked up an P9 phone. Someone from Huawei told me that if you take a video of a bunch of people talking (like at a party or dinner table for example) -- when you play it back, you can isolate what each person is saying by clicking on them in the video. That is a great feature that I want to test, but I can't get it to work on my phone. What am I doing wrong? Is this a real feature? Thank you!!!