I have no idea if it's true or not but I was mortified at the thought.
The video looked real to me and scary.
I would never let my little child go into a doctors office or dentist office without me. It just wouldn't happen.
Children used to go into the dentist by themselves and that was considered normal?
One of my sisters is 14 and she still insists my mom goes in with her. I stopped maybe when I was 12 but all kids are different. The kids shown were so young!
Going to the office or to the various chairs for treatment?
Most of what happens in a dentists office is at least unpleasant. Let's take someone with good dental hygiene and perfect checkups. There are still x-rays to take and they poke. Cleaning is not as unpleasant for kids as for adults (less buildup, the really nasty stuff is calcium buildup, most kids have no excess calcium) and the cleaning paste is far less gritty than in my youth and in comparison the taste is wonderful, but it is still not what most would choose. Heck just keeping your mouth open is not especially fun. Oh and checking for pits and fissures means using that hooked thing, sooner or later it will poke.
Kids rightly do not like this. If mom or dad are there the kid will do what he can to get mom or dad to make it stop. That often means screaming their head off. Now mom or dad is in a very nasty situation. The really ironic part is many kids are just fine if not with mom or dad. Not all kids are problems if mom or dad are present. 40 years later i can think of some of my dad's patients that I know would have been fine. But if one in 10 is a problem that means on average more than one problem a day.
And as I've said elsewhere, please no matter what else never say 'It wont hurt'. Kids know that when they hear that it will hurt.
One thing dad was a stickler about was telling the kids the truth about pain. That a Novocain shot would pinch. The results with most kids was amazing. Being told yea, this will hurt, but not all that much and having it be accurate created trust.
I have seen kids screaming like that. It was far from the norm. Also 10-20% were that way on the way in and more were that way before any chance of pain.
Dad's office was on the first floor of a 4 or 5 story medical building and the main treatment area was 3 chairs facing towards those windows which looked out towards the main entryway So everyone going in could see what was going on. 99% of the time the blinds were open. Exceptions for real problem patients.
It was also standard practice with younger patients to hold their hands during the any injection. Just enough would try to reach up and grab the syringe, not a good things and too late if one tried to react.
The vast majority of the time this meant that any patient with other patients in the same room for everything except the x-rays. Bit of a difference there. Children seem to either like or at least not dislike other children being present, adults often seem to want privacy.
EDIT: I guess one might say technically many of the parents did go in with their kids. The front desk had counters facing the reception area and also inside and much of the time a parent would accompany their child that far. So they were with the child going through the door from the waiting room, but once inside they handed the child off, usually to the assistant.