Hello,
I see that this topic appeared before and was resolved by engineers but I have been having this problem over the past few days. I have tried uploading mp4s via dropbox desktop app, via browsers, Chrome and Microsoft Edge and even tried changing the format of the the video. I don't usually have problems uploading files of the size I want to upload, so any suggestions, please?
Edit: I have used 1.7 GB of 2TB storage, so space shouldn't be an issue.