On that form witnesses must be listed. If the insurer has surveillance videos, they will have to disclose them. In my experience, in Northern California different judges who hear Mandatory Settlement Conference hearings have varying approaches to how they conduct the hearing. Some judges are much more rigid in terms of how they apply the procedural rules on closing further medical evidence and discovery. Some judges will make extended attempts to get cases settled, adjourning cases and continuing them for further settlement conferences if it looks like settlement discussions will be productive.
Some judges are reluctant to set cases for trial unless absolutely necessary.
Other judges are much more willing to set a case for trial. Some judges are very strict about procedural rules but others may allow the parties some latitude such as allowing identification of medical exhibits or taking of depositions after the Mandatory Settlement Conference if the parties agree. The above are generalities. The particulars in your situation may depend upon a number of factors including the judge assigned to the case, the facts of the case, the posture of negotiations or issues to be determined and so forth.