Historically, almost all casinos prohibited the taking of photographs and signs at entrances were posted to that effect. ... allow photos in the casino, but only selfies (you and/or your family). Bottom line: You can bring your cell phone or camera, but use it with discretion.
At the very least, can you use your phone at the casino?
No electronics, including cell phones, can be used while seated at a casino game. The thick walls of most large casinos block cell phone reception anyhow so you have to walk outside to get a dial tone.
At the least, why can't you take photos in a casino? As mentioned, casinos often cite security as the reason photography is prohibited, but the real reason they don't like photography is related to customer privacy. Casinos know people are often in casinos that shouldn't be, and are often with people they shouldn't be with (like mistresses or even prostitutes).
So too, can u film in a casino?
No, you can't. Sometimes a particular guard may turn a blind eye for one moment, if it's obvious you're just goofing off with friends, but you definitely can't video record inside a casino.
Is it legal to film in a casino?
It's not illegal, but casinos don't allow you to do it because many of their customers don't want to be filmed or photographed playing. If you try it you won't be arrested, but you probably will be ejected.