questions about chat system implementation


I’m setting up chat plugin and had a few questions. The chat is located here:

The client wants the public to be able ot chat with her monday-saturday 9-5. Is this an option in the system? I have public users checked in permissions but it’s not showing any active users when you visit the page. I don’t want them to have to be forced to login to chat. Does the chat system support uploading files? Does it support embedding youtube and other videos from other online sites?