I doubt this is a coincidence. And if it's not you could mention getting the idea from here. If it turns out you have a connection (hell maybe this is an old game that used to be patreon-only and they got the idea from you or something) and you let me know I'll edit/delete this comment if you'd like.
Also missed a couple key things story wise that work better in the film. For one it would have helped to make it clear that it only moves when you're not looking. It's very clear in the video but not the game. Him leaving his wife there instead of them both leaving only makes sense because someone has to stay and watch the box. Also there is a reason he leaves instead of calling the cops or similar (not saying here, spoiler for the video).
Besides all that, it makes a nice creepy atmosphere especially for a five day game.