You said phrase ''certain elements of it will be kept a secret'' and that was not mentioned anywhere by trezor developers or me, so it was your own interpretation 
Yes, it was my interpretation of what they said and the word combinations they used. It would really be cool if the chip ends up being completely open-source and I hope it will for the future of the entire hardware wallet industry. And thanks for the video. It's a rather long one so I will watch it in episodes.