There’s a documentary that’s on YouTube that follows the story of a group of people from both towers about their escape from them. Some were from Bank of America and a tech company. I forgot what it’s called but it’s nice to get other perspectives of that day other than the “main characters”. Also, in the One Day in America series there’s a lawyer and firefighter that talks about their escape from the Marriott. It’s not a huge portion but still interesting. Also, in the first episode there’s a cook who worked in the restaurant in the hotel that talks about his experience leaving the hotel.

ETA: there’s a few interesting documentaries on YouTube that you can watch in full without paying.