The problem with body cameras or camcorders is that they can be confiscated.
You have to decide before going to the protests if it's more important for you to participate or more important to document. Each has its pros and cons and you might have the chance to do both, but you will need to prioritize one over the other when push literally comes to shove.
Decide your priorities and then adjust your OpSec accordingly.
Adding to this, each word and words around it are given a statistical percentage. In other words, what are the odds that word 1 and word 2 follow each other? You scale that out for each word in a sentence and you can see that LLMs are just huge math equations that put words together based on their statistical probability.
This is key because, I can't emphasize this enough, AI does not think. We (humans) anamorphize them, giving them human characteristics when they are little more than number crunchers.