This is how I feel. I also believe that Let's Plays and streaming is a transformative work, where you aren't going to any streamer/LPer to see the game, you're going to the streamer/LPer you like who plays games and makes banter you like. Like I'd happily watch the Super Best Friends play next to anything because I like how they interact with games and each other but I'd avoid Pewdiepie because at best he just doesn't care about anything he says or does and at worst he's a massive racist and anti-semite who has a massive audience, plus he isn't funny or entertaining to me so I wouldn't watch him play a game I could watch people I actually enjoy play the game.
In this case though, I think he should be allowed to keep his LP up. I mean, at least in the way I don't think Campo Santo should be able to take it down. If Youtube want to kick Pewdiepie off YT because he's a massive shit and breaking ToS by being racist or anti-semetic in videos then I'm all for it. Same if he got banned in PUBG for streaming it while using racist language. But I'm not a fan of devs being able to take down their content because they are bad people because then what is to stop any other dev from just taking down any video because they don't like the person.
And yeah, Pewdiepie (and other LPers/streamers) didn't make the game so shouldn't profit off the game, but they did make the video. The game is like an instrument that they play. Some do it badly and basically just play the game start to finish with next to no insight or talking and some edit it down to the "best" bits, some have a friend along they chat with about the game or other things and do more with their video than just stream a game.
At the end of the day though, I guess Campo Santo do have a right to remove the videos if they want, I mean they do own the images and assets and product used in the thing but knowing Youtube and the world right now, they will take the video down, Pewdiepie will contest, they will go to court and Campo Santo will win and then devs and pubs will have the right to shut down any LP or review that uses footage of their game, even more power because they can basically do that for 2 weeks anyway with Youtube but maybe they'll be able to just get them off permanently without the uploader being able to contest..