They are pre-recorded.
I bet for Everton, so I watch this live game 2 days ago, sound is the same as the youtube video.
I guess sound engineering in behind had a good hand at editing video in live.
You're right about that word, the
sound engineering.
They're the ones who's assigned in the music or any sound effects that will be added to a show, a gig or event like this. The addition of it for them to make the rendition and show appealing to the viewers.
That's why they are very important part of it, they're like the silent workers that we don't usually appreciate as we watch events.