Let's be realistic, unless you become a super popular youtuber, which I doubt, it's not so common, the real risk is to be monitored by some intelligence agencies and visiting that country.
For example, if you talk shit about country X, if you try to visit that country, they will refuse your entrance. Depending on the country, you might be even mentally tortured for some hours in an obscure interview. But you are denouncing war crimes committed by that country, so there is no reason to visit it.
Something more realistic would be having more difficult in visiting ally countries, they share information between each other, they might allow your entrance, but it will be tiring to pass through some extensive interviews.
Unless you become a big fish, I can't think about real security issues. There are tons of micro influencers and mid size political commentators, they might be monitored in a not so dark list, but they won't chase you in other country.
Also, there are doxxing gangs, fake accusations, groups in the other side trying to invent and spread some lies. This is not so likely to happen, but if you become mildly popular, you can be targeted, doxxed, they can spread your personal data and say bullshit about you.
I know some political youtubers who were chased on X, some gangs started to talk they were pedos or killed someone, just straight up lies, but they are backed by some political organizations, they have bots, they can easily get this lie viral and reach +100k views. And when people think you are a murderer or a pedo, they will send some gifts for your house (doxxed address), put your family at risk and so on. Not likely to happen, unless you start to bother some powerful entities.
