Oh wow, two sequels? That's really promising!
As for a 15 minute video, I don't think you need to write such a long video. It could be smaller and more doable, with more poses, things to explore etc.
Anyway, I'm really looking forward to the development of this game! I'm going to miss having things to explore once it is finished, but there is so much content already that I can't really complain.
Thanks for doing this! Many content creators usually abandon such large-scale projects, so I appreciate the dedication :)