I saw a video just the other day by some doctor on YouTube talking about healthy nutrition. He is one of those that believe in a holistic approach in treating many kinds of medical condition by natural means. He was being very critical about medical establishment and pharmaceutical companies. Somewhere along the way he went off track and displayed one of those scary clown pictures and screamed out "haaa!!!" in the middle of the talk. He was proving some kind of point. I wasn't scared much but I did jump a little bit. It was totally uncalled for. Luckily I did not have my headphones on. I never wear any kind of headset or headphone since my last acoustic trauma. But I did not notice any increase in my tinnitus immediately after this event. (Coincidentally, this doctor also made a video on tinnitus.)
But yeah, I get what you're saying. These screamer videos are just plain stupid. I may have been exposed to maybe 1 or 2 of these many years ago by some dumb friends. This was in the time when this kind of moronic occupation was a thing. Nowadays it's mostly a thing of the past luckily, but some people just don't know what else to do with their time.
You should be fine, don't worry about it. Just try to avoid this kind of incidents. First step to that is in not using headphones, headsets, earphones, earbuds, airpods, etc. Just use normal speakers at low to medium level. But of course if you already have some kind of hearing damage, you may have extra sensitive hearing. What I mean by that is that your brain boosts the hearing thresholds, as part of the active amplifier mechanism. So your tinnitus may increase when you're hit by a sound blast, and the sound may be hurtful (hyperacusis). But this should settle down in the following days.
Sudden sound blasts are probably more hurtful than being gradually exposed to higher and higher sound levels. So you should avoid that when you can. First step to that is, as I said, not using headphones. I could go on and explain how and why. But to keep it simple, just avoid using headphones.
I hope you will get better soon.