Issues with Contributor Video Uploads in Dovetail

hello, one of our contributors is unable to upload videos to dovetail — this is the same kind of videos we used to upload previously without any problems (mp4, a normal filesize — under 300mb), nothing different in our setup. as an admin, i was able to upload the video (!) but i can’t be doing it for every single video 🫠 is this a temporary issue or has something changed in contributor access settings?