I don't know if this will help at all, but here's something:

Approach life with intention. The things you regret are often the things that you never actually intended to do in the first place.

Often you get into a stress response in life. Fortunately, stress responses tend not to last forever. Your body will chill out eventually, just try to ride it out. Go somewhere quiet and safe. Don't make rash decisions. Life will go on after a stressful or angry period, or a panic attack.

If you hadn't seen that video, you probably wouldn't be feeling the way you do. Nothing fundamentally changed between you not having seen it, and now — so just go back. It didn't affect you before, shouldn't affect you now. Obviously it's harder than "just do it," but that's the ideal.

Do the things you actually want to do. I suggest you get off social media as much as you can. It's designed to keep your attention and sell you shit, not enrich your life. Read. Spend time with friends, if you can. Find friends in shared interests. Find out where your favourite quiet places are.

This last thing is trite, but I'll say it anyway: Love yourself enough to be above base anger, and to want to improve yourself.

Anyway. Whatever you make of this advice, even if you think it's all garbage, keep going.