I haven't downloaded this film, but as a general comment: often because of limitations in most browsers it's hard to download films from SLR. Software like Internet Download Manager (which isn't freeware) helps you to download multiple original films at once and download them more quickly. I'd say that the files become fragmented about 70% of the time without IDM. Also, you'll have fewer problems if you download the "original file" rather than the converted video.
There's a 30-day free trial.
https://www.internetdownloadmanager.com/download.html