He does list three videos on his page. An 8-minute video, 30 minute video, and 93 minute video. You might have to buy them...
Even if you/I can't find the gremlin video, I highly recommend you watch any of Rob Ager's videos on movies you think you already know. He does do a lot of work on Stanley Kubrick. He will insist The Shining isn't his favorite movie, but that's hard to believe with how much he has focused on it. Anyways, Collative Learning is an excellent rabbit hole to fall down.
https://www.collativelearning.com/FILMS%20reviews%20BY%20ROB...
Edit: Okay I'm a doofus, on mobile I needed to scroll horizontally to find the watch links. I don't recognize the 8-minute video or 30 minute video, so it must have been the 93 minute video that I saw.