Comment changed by someone else?

Is it possible that someone else can edit/change a comment I left on a video. I responded to a comment about a video of a boy mowing an old lady’s lawn. The comment was basically we are in a living hell. I commented that president isn’t stopping you from working in your neighborhood. The next day someone responds to the comment and my comment was basically “this would never happen”. Is it possible for someone to change my comment and most of the other comments on the video fit the same theme. So is this a big psyop to spread doom??