Egypt is a VERY religious country. More than 70% of the population considers religion an extremely important part of their lives. For comparison, in Serbia that's just over 30%, and in Russia it's 16%.

You can see this clearly even on the streets. In shops and stalls, you often hear audio recordings of the Quran playing. Taxi drivers frequently drive around with the same audio accompaniment. There's an entire radio station (maybe more than one) that continuously broadcasts reciters. I can't really imagine how they work like that every day, but sometimes you just want some quiet.

Regular calls to prayer over loudspeakers and Friday sermons that you hear everywhere are just par for the course.

I've come across elevators more than once that automatically play some prayer while moving. Though honestly, in some of them it seems almost necessary. In the video, it's clear they forgot to build the elevator shaft. And there's no sensor for closing the doors. Very safe.

Once I accidentally stumbled into a Christian service. Overall, if you don't know exactly where you are and what's happening, you might not be able to tell it apart from Muslim prayer just by listening. They sound very similar. It makes sense that Abrahamic religions are related. But when both groups recite prayers in the same language, they're like twin brothers.