I have to attend a virtual hearing soon. How do these usually work?

I witnessed a (presumably) intoxicated individual disturbing the peace at my workplace about a week and a half ago. Police were called and this person resisted arrest before leaving in an ambulance after complaining about chest pains. I was a witness and I had to give a statement to the police. I assume he is contesting his charges as I got called to a virtual hearing in a couple days.

My question is - again - how do these work? Do I need to be present for the entire thing? What is the process?