These specials were originally shown at the Kimetsu no Utage live event which was held on October 20th 2019 in Tokyo. The cast members present at the event did a live dubbing of the characters.
A version with a newly recorded dub was later featured on the DVD & Blu-ray releases containing a recording of the event which came out on August 26th 2020.
Kaido is the best site to watch Kimetsu Academy: Special Edition
SUB online, or
you can even watch Kimetsu Academy: Special Edition
DUB in HD quality.
You can also find
anime on Kaido website.