This is an example of an online performance. It is the Foo Fighters at Reading & Leeds festival. An online performance is where all of the camera work is live with live editing. 
The majority of the shots are close ups of Dave Grohl because he is the main performer.
We can tell this is an online performance because there are people walking infant of the cameras. If this was an offline performance they would have made sure non of this happened so they could try and get the best shots.
This is an example of an offline performance. We can tell its offline due to the very goo sound quality. Also there are a lot of edits that can only be done in post production. 
Matthew Parkins Film 