Webinar with one licence and panelists

Hello, I would like to know it it is possible to organize 2 webinars at same day/hour having just 1 webinar licence.

If so, after setting panelists for both of them,  can I start a webinar naming a panelist as co-host, and also start second webinar naming an other panelist as co-host, so they can start webinar by themselves?

Or, can panelists start a webinar by themselves, even without organizator?