I know a lot of EFR instructors (Emergency first response, the people who teach CPR classes) who used to be ambivalent about this and now are firmly in the "fuck you fuck your phone category.
Maybe its demographics, EFR instructors do tend to be older and less online, but there's been a shift from voyeur filming being seen as irritating and tasteless to actively harmful.
I met one lady who had an entire section of her lecture based on how to divide labor in emergency and one of those steps was crowd control. If you are taking charge of an emergency situation, you delegate tasks. Point at one person and tell them to call 911, Point at another person tell them to warn traffic, Point at another person tell them to get the first aid kit if you know where it is. You assign small tasks to individuals instead of asking a crowd that way the task actually happens, and you're not sitting around 20 minutes later wondering why the ambulance is taking so long to show up and it turns out that everyone assumed someone else called.
Now there is another step. Pick a big dude and tell him to stop people from filming. Which is actually the tamest version of what she said, because this lady went on and on about how phones are fragile, light, small, pieces of computer equipment that can be easily punted into oblivion.
And yeah, she's probably the most vocal proponent of property destruction in the face of voyeur filming I've heard lately but she's far from the only person in emergency services who's frustrated with the eternal quest for viral videos of strangers pain.
And to be clear there is a huge difference between the paramedic who doesn't want you filming and the cop who doesn't want you filming.