You can record timeline even with android cam face recognition - https://hub.virtamate.com/resources/andriodfacemocap%EF%BC%88%E5%AE%89%E5%8D%93%E6%89%8B%E6%9C%BA%E9%9D%A2%E9%83%A8%E6%8D%95%E6%8D%89%EF%BC%89.27531/
So now we have a proof that recording with timeline is possible. Somebody, please...