If you’re talking about the base image, it’s sort of real.
The player is YouTuber Max Fosh and it was a charity football event. However the incident (as far as we know) was not scripted and he actually tried hard to get a yellow card just to be able to pull off this stunt. You could probably find the video he made on it by searching “Max Fosh yellow card”.
In my experience, it is good at simple to medium complexity regex. For the harder ones it starts being quite useless though, at best providing a decent starting point to begin debugging from.