There's been user to user—and user to Xara—abuse here, too.

It is a user-made video with yet another (non-English speaker) user who commented to your comment. It is a poorly done video. The resolution is poor, the music is distracting (good thing there is a mute option). I've seen some poorly done user Xara video tuts posted here and elsewhere as well. No matter where I see a poor tut, I just pass on making comments to them. People tend to get defensive, other users may stick up for the poster, etc.

While there have been rude comments on the Affinity forum, FB & YT is a whole different arena for rude commentators.