Those glasses look really nice. Much nicer than the original Google glass.
Also, I guess the last few years of learning Mandarin have been a complete waste - 不太好了！
Not for your brain plasticity
This feels like the twilight zone. It’s not like we use to make sure the viewer knew what gender the person speaking was. What is this for?
I suppose if I was feeling extremely generous; if you wanted to describe what happened in the video to someone else, you would use said pronouns. "(He) gave (her) these cool looking glasses". I don't feel that generous though.