Journalists surveilled by the DHS for documenting police violence in the US (the best I could do with your very specific request) https://www.theguardian.com/us-news/2020/jul/31/dhs-intellig...
YouTube quickly rolled back on the supposed shadowban, but it's very well documented by users on Twitter, Reddit and YouTube, to the point he would need to have a bot army to fake it. I mentioned the warnings on the video as further evidence of YouTube (specifically or systematically, IDK) targeting the video.
Now where you have a good point in my opinion is that he could have shared info on the agents, if he had this info and was legally allowed to. There are reasons he could have not shared, but it's still a good point of speculation.