[Fradow]

The main takeaway is that, unless you are trained for it (like lifeguards are) and actively looking for the signs, you will probably not spot someone drowning, even if they are right next to you.

Someone drowning isn't at all like pictured in movies. Those videos aim to dispel that, and maybe teach you some of the signs of someone drowning, and also that you should watch your kids closely when they're at the pool.