Check out their web site Welcome Family & Friends : Richmond Hill Seventh-day Adventist® Church Richmond Hill ON (rhsda.ca)
Here is the movie Todor mentioned on the origins and history of the Seventh-day Adventist Church: https://www.youtube.com/watch?v=nH2r0J5VbL4
Also, he suggests a series of brief video clips (5-6 min each) on the history of Christianity and how Seventh-day Adventists are part of the Christian faith community.
Here’s the link to the Season 1 Episode 1, from the early Christian church onwards.
Constantine The Great - Paganism to Christianity | Episode 1 | Lineage - YouTube
In addition, there are two movies made based on the life stories of two famous Seventh-day Adventists:
Dr. Ben Carson – the movie “Gifted Hands,” starring Cuba Gooding
Desmond Doss – the movie “Hacksaw Ridge,” starring Andrew Garfield and directed by Mel Gibson