Hey, been in a kinda similar boat—helped throw a birthday bash for my roommate, and one of her cousins posted all the golden moments... but only to their close friends. I wasn't on it either (rude lol), but my friend showed me, and I had to keep those vids. If you can access the story through someone else, you could try Private Instagram Stories Downloader — helped me grab the clips without the awkward "can you send me everything?" convo. Memories like that deserve to stick around!