I did not screenshot it unfortunately, but one of his members left a comment on the video where he made the slave joke. It was just a timestamp 59:16 with no text (59:16 was the slave joke). I clicked on the video today and the comment with the timestamp is now gone. So he approved the comment, then later on went back to the video and deleted it once he realized what the timestamp was?
Of the things he said in that stream, I don't even think the slave comment was the worst one. Like what Ruffian_Forever said, the one where he mimicked the voice of the little girl and made sex jokes was really creepy. You could say he's just an idiot and blurting out random stuff, but he did it twice.
Second time was at 31:32