Personally I will not be working directly on the videos but rather a CAD model to be used in the video, but to be prepared and purely out of my curiosity in design work, I hope somone can enlight me with the process and softwares you would go about making something like these. Like: do they actually have a physical model of screen or cellphone while filming? or is that CAD models? did they use Premiere? Final Cut? or Nuke, as my animation friend suggested?