I have a small theory of my own regarding the feature videos and how close the game is to release. Now I'm assuming these feature videos will only cover the largest features of the game (future tech, colonies, multiplayer, etc.) and were meant to release on a steady schedule leading up to release before the delays and their production being disrupted by COVID-19. This is complete speculation but I expect there to be like 5-6 major feature videos in total or left to make. So while its not exactly an exact answer its not a bad idea to use the releases of feature videos to gauge how much longer we may have until release.