In short, no. There is nothing that stops students from going over 45 seconds. The platform only has a countdown timer that starts at 45 seconds to let students know how long their video is, but it is a "soft limit" - it just turns red once students go over 45 seconds.
That said, there is a purpose behind our short videos. The first is that teachers don't have time to watch long videos. The second is that it forces students into a metacognitive process of trying to be concise with the material. The third is that shorter videos are easier on bandwidth, which helps for students that may have connectivity challenges.
