Yes, but at least “From summer 2023 onwards, it will be permanently downloadable from this site.”

RemindMe! 3 months

Festivals quite often want films to be "exclusive", so maybe it's to do with that.

Went digging through the wayback machine to find it and its available here: https://web.archive.org/web/20230117024804/https://www.ahist...

which leads to: https://drive.google.com/file/d/16ATMkf7SAwwjePZZZb0mFrFX5rM...