Hello, yes, totally. Share it the way you want: I am not sure of what itch.io will authorise you to do for 3D models, so you can do a traditional submission, or YouTube video, or creating a new topic for it, or both. You can link a YouTube video to the classic submission when you edit a project (it's below the cover option). In resume, your idea is good so do what you want. I encourage all the prototypes and the tutorials, ect.... since December and the results in December was very good,especially for a start.